通用中文 | 达比加群酯胶囊 | 通用外文 | Dabigatran Etexilate |
品牌中文 | 品牌外文 | Pradaxa | |
其他名称 | 达比加群酯甲磺酸盐胶囊 | ||
公司 | Boehringer Ingelheim(Boehringer Ingelheim) | 产地 | 德国(Germany) |
含量 | 75mg | 包装 | 60粒/盒 |
剂型给药 | 胶囊 口服 | 储存 | 室温 |
适用范围 | 抗凝血,直接凝血酶抑制剂,适用于在有非瓣膜性房颤患者中减低卒中和全身性栓塞风险. |
通用中文 | 达比加群酯胶囊 |
通用外文 | Dabigatran Etexilate |
品牌中文 | |
品牌外文 | Pradaxa |
其他名称 | 达比加群酯甲磺酸盐胶囊 |
公司 | Boehringer Ingelheim(Boehringer Ingelheim) |
产地 | 德国(Germany) |
含量 | 75mg |
包装 | 60粒/盒 |
剂型给药 | 胶囊 口服 |
储存 | 室温 |
适用范围 | 抗凝血,直接凝血酶抑制剂,适用于在有非瓣膜性房颤患者中减低卒中和全身性栓塞风险. |
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分类: 药物使用说明书 |
PRADAXA®(甲磺酸达比加群酯dabigatran etexilate mesylate)使用说明书2012年12月版
处方资料重点
这些重点不包括安全和有效使用PRADAXA所需所有资料。请参阅下文为PRADAXA的完整处方资料
PRADAXA® (甲磺酸达比加群酯[dabigatran etexilate mesylate])胶囊为口服使用
美国初始批准:2010
最近重大变化(红色为修改部分)
剂量和给药方法(2.2,2.4,2.6) 1/2012
禁忌证(4) 12/2012
警告和注意事项(5.3,5.4) 1/2012
警告和注意事项(5.1) 11/2012
警告和注意事项(5.2) 12/2012
适应证和用途
PRADAXA是一种直接凝血酶抑制剂适用于在有非瓣膜性房颤患者中减低卒中和全身性栓塞风险(1)
剂量和给药方法
(1)对患者有CrCl >30 mL/min:150 mg口服,每天2次 (2.1)
(2)对患者有CrCl 15-30 mL/min:75 mg口服,每天2次 (2.1)
(3)治疗期间临床上指示时评估肾功能和从而调整治疗(2.2)
(4)指导患者不要咀嚼,弄破,或打开胶囊 (2.3)
(5)对转换至或来其他口服或非肠道抗凝建议的评述 (2.4,2.5)
(6)侵入性或手术前当可能暂时终止PRADAXA,然后及时再开始(2.6)
剂型和规格
胶囊:75 mg和150 mg (3)
禁忌证
(1)活动性病理性出血 (4)
(2)对PRADAXA严重超敏性反应史(4)
(3)机械性人工心脏瓣膜 (4)
警告和注意事项
(1)出血风险:PRADAXA可引起严重和,有时,致命性出血。及时评价失血的体征和症状。(5.1)
(2)生物人工心脏瓣膜:建议不要用PRADAXA(5.2)
(3)暂时终止:避免治疗失误缩小卒中风险(5.3)
(4)P-gp 诱导剂和抑制剂:对达比加群暴露影响 (5.4)
不良反应
最常见不良反应(>15%)是胃炎样症状和出血(6.1)
为 报告怀疑不良反应,联系Boehringer Ingelheim Pharmaceuticals,Inc. 电话(800) 542-6257或(800) 459-9906 TTY或FDA电话1-800-FDA-1088或www.fda.gov/medwatch.
药物相互作用
(1)P-gp诱导剂利福平[利福平]:避免与PRADAXA共同给药 (5.4)
(2)P-gp抑制剂决奈达隆[dronedarone]和全身性酮康唑[ketoconazole]在患者有中度肾受损(CrCl 30-50 mL/min):考虑减低PRADAXA剂量至75 mg每天2次 (7)
(3)P-gp抑制剂在有严重肾受损患者(CrCl <30 mL/min):建议不使用PRADAXA (7)
特殊人群中使用
老年人使用:随年龄出血风险增加 (8.5)
完整处方资料
1 适应证和用途
PRADAXA适用于在有非瓣膜性房颤患者中减低卒中和全身性栓塞的风险。
2 剂量和给药方法
2.1 推荐剂量
对 有肌酐清除率(CrCl) >30 mL/min患者,PRADAXA的推荐剂量是150 mg有或无食物口服,每天2次。对有严重肾受损患者(CrCl 15-30 mL/min),PRADAXA的推荐剂量为75 mg每天2次 [见在特殊人群中使用(8.6)和临床药理学(12.3)]。对有CrCl <15 mL/min或透析患者不能提供给药建议。
2.2 给药调整
开始用PRADAXA治疗前评估肾功能。当临床上指示定期评估肾功能(即,在在临床情况可能伴肾功能下降更频)和从而调整治疗。发生急性肾衰而用PRADAXA患者终止PRADAXA和考虑另外抗凝治疗。
在有中度肾受损(CrCl 30-50 mL/min)患者中,同时使用P-gp抑制剂决奈达隆或全身性酮康唑 可预计产生严重肾受损观察到达比加群暴露相似。考虑减低PRADAXA剂量至75 mg每天2次 [见药物相互作用(7)和临床药理学12.3)]。
一 般说来,不需要评估抗凝作用程度。当需要时,使用一种活化部分凝血活酶时间(aPTT)或蝰蛇毒凝血时间(ECT),而不是国际标准化比率 (international normalized ratio, INR),评估患者对PRADAXA抗凝活性[见警告和注意事项(5.1)和临床药理学(12.2)]。
2.3 对患者指导
指导患者整吞胶囊。胶囊的破裂,咀嚼,或内容变空可能导致增加暴露[见临床药理学(12.3)]。
如在计划时间1剂PRADAXA没有服用,应尽可能在相同天立即服用;如果下次计划剂量前至少6小时不能服用应跳过丢失剂量。为补上丢失剂量PRADAXA剂量不应加倍。
2.4 从华法林转化或转化至华法林[Warfarin]
当患者从华法林治疗转化至PRADAXA,当INR低于2.0时终止华法林和开始PRADAXA。
当从PRADAXA转化至华法林,根据肌酐清除率如下调整华法林开始时间:
● 对CrCl ≥50 mL/min,终止PRADAXA前3天开始华法林。
● 对CrCl 30-50 mL/min,终止2天PRADAXA前开始华法林。
● 对CrCl 15-30 mL/min,终止PRADAXA前1天开始华法林。
● 对CrCl <15 mL/min,不能做建议。
因为PRADAXA可增加INR,只有PRADAXA 已停止至少2天后INR将更佳反映华法林的效应[见临床药理学(12.2)].
2.5 转化自或至非肠道抗凝
对当前接受一种非肠道抗凝患者,下一次在非肠道药物已给药时间前0至2小时开始PRADAXA或在连续给予非肠道药物终止的时间(如,静脉未分离肝素)。
对当前服用PRADAXA患者,等待12小时(CrCl ≥30 mL/min)或24小时(CrCl <30 mL/min)末次剂量PRADAXA后开始用非肠道抗凝治疗前[见临床药理学(12.3)]。
2.6 手术和干预
如 果可能,因为增加出血的风险,侵入性或手术前终止PRADAXA 1至2天(CrCl ≥50 mL/min)或3至5天(CrCl <50 mL/min)。对患者进行重大手术,脊髓穿刺,或放置脊髓或硬膜外导管或口考虑较长时间,可能需要患者完全止血[见在特殊人群中使用(8.6)和临床药 理学(12.3)]。
如果手术不能延迟,有增加出血的风险[见警告和注意事项(5.1)]。应权衡出血风险和干预的紧迫性[见警告和注意事项(5.3)]。
3 剂型和规格
150 mg胶囊有淡蓝色的不透明帽印有黑色的Boehringer Ingelheim公司符号和奶油色不透明体 印有黑色“R150”。
75 mg胶囊有奶油色的不透明帽有黑色的Boehringer Ingelheim公司符号和奶油色不透明体印有黑色的“R7”。
4 禁忌证
有以下患者禁忌PRADAXA:
● 活动性病理性出血[见警告和注意事项(5.1)和不良反应(6.1)].
● 对PRADAXA严重超敏性反应史(如,过敏反应或过敏性休克) [见不良反应(6.1)].
● 机械性人工心脏瓣膜 [见警告和注意事项(5.2)]
5 警告和注意事项
5.1 出血风险
PRADAXA增加出血风险和可能致明显和,有时,致命性出血. 及时评价任何失血体征或症状(如,血红蛋白和/或血红细胞比容下降或低血压)。有活动性病理性出血患者终止PRADAXA [见剂量和给药方法(2.2)]。
出血的风险因子包括同时使用增加出血风险其他药物(如,抗血小板药物,肝素,溶纤维蛋白 治疗,和慢性使用非甾体抗炎药NSAIDs)。有肾受损患者中PRADAXA的抗凝活性和半衰琪增加[见临床药理学(12.2)]。
不 能得到对达比加群特异性逆转剂。血液透析可能去除达比加群;但是支持使用血液透析作为治疗出血临床经验有限[见药物过量(10)]。在临床试验中可能考虑 使用但未曾评价激活的凝血酶原复合物浓缩剂(aPCCs,如,FEIBA),或重组凝血因子VIIa,或凝血因子II,IX或X浓缩物。硫酸鱼精蛋白和维 生素K预计不会影响达比加群的抗凝活性。存在血小板减少情况中考虑给予血小板浓缩物或曾使用长效抗血小板药物。
5.2 有人工心脏瓣膜患者中血栓栓塞和出血事件
在 RE-ALIGN试验中在有双叶[bileaflet]机械性人工心脏瓣膜患者评价PRADAXA的安全性和疗效,其中有双叶机械性人工心脏瓣膜患者(最 近植入或纳入前3个月以上植入)被随机化至剂量调整华法林或150,220,或300 mg PRADAXA1天2次。RE-ALIGN在PRADAXA治疗组当与华法林治疗组比较由于发生显著更多血栓栓塞事件(瓣膜血栓形成,卒中,短暂性脑缺血 发作,和心肌梗死)和过量重大出血(主要地术后心包积液需要干预的血流动力学损害)提早结束。双叶机械性人工心脏瓣膜移植的术后3天内开始用 PRADAXA患者以及纳入植入瓣膜前3个月患者均见到这些出血和血栓栓塞事件。因此,有机械性人工心脏瓣膜患者禁忌使用PRADAXA [见禁忌证(4)]。
尚未研究使用PRADAXA为预防血栓栓塞事件在有房颤患者在其他形式瓣膜心脏壁情况中,包括存在生物人工心脏瓣膜而不建议使用。
5.3 暂时终止PRADAXA
终止抗凝,包括PRADAXA,对活动性出血,选择性外科手术,或侵入性操作,使患者处在卒中风险增加。缩小治疗失误。
5.4 P-gp诱导剂和抑制剂对达比加群暴露的影响
PRADAXA与P-gp诱导剂(如利福平)的同时使用减低对达比加群暴露和一般说来应避免[见临床药理学(12.3)]。
P-gp抑制作用和受损的肾功能是导致达比加群暴露增加主要独立因子[见临床药理学(12.3)]。有肾受损患者中同时使用P-gp抑制剂与任何单独因子所见比较预计产生达比加群暴露增加。
有 中度肾受损患者中(CrCl 30-50 mL/min),当决奈达隆或全身性酮康唑s与PRADAXA共同给药时,考虑减低PRADAXA剂量至75 mg每天2次。有严重肾受损(CrCl 15-30 mL/min)患者避免使用PRADAXA和P-gp 抑制剂同时使用[见药物相互作用(7)和在特殊人群中使用(8.6)]。
6 不良反应
6.1 临床试验经验
因为临床试验是在广泛不同情况下进行的,临床试验观察到不良反应率不能与另一种药临床试验发生率直接比较而且可能不反映实践中观察到的发生率。
RE-LY(随机化评价长期抗凝治疗)研究提供使用两种剂量PRADAXA和华法林的安全性资料[见临床研究(14)]。表1描述患者数及其暴露。展示110 mg给药组资料有限因为这个剂量未被批准。
在RE-LY中药物终止
对PRADAXA 150 mg导致治疗终止的不良反应率为21%和对华法林16%。最频繁不良反应导致终止PRADAXA是出血和胃肠道事件(即,消化不良,恶心,上腹痛,胃肠道出血,和腹泻)。
出血[见警告和注意事项(5.1)]
表 2显示在RE-LY研究中治疗阶段时经受严重出血患者数,与出血率每100患者-年(%)。满足以下1或更多标准重大出血:出血伴有血红蛋白至少减低 2 g/dL或导致输血至少2单元,或在关键性区域或器官症状性出血(眼内,颅内,脊髓内或肌肉内有隔室综合征,腹后壁出血,关节腔内出血,或心包出血)。一 种危及生命出血符合以下1或更多标准:致命性,症状性颅内出血,血红蛋白减低至少5 g/dL,输血至少4个单元,伴有低血压需要使用静脉正性肌力药[inotropic agents],或需要外科手术干预。颅内出血包括大脑内(出血性卒中),蛛网膜下腔,和硬膜下出血。
跨越按基线特征定义的主要子组用PRADAXA 150 mg和华法林重大出血的风险相似,除了 年龄,其中对患者≥75岁PRADAXA重大出血趋向于较高发生率(危害比1.2,95% CI:1.0至1.4)。
在接受PRADAXA 150 mg患者比接受华法林患者主要胃肠道出血较高率(分别1.6%相比1.1%, 相比华法林有危害比1.5,95% CI,1.2至1.9),和任何胃肠道出血较高率(分别6.1%相比4.0%)。
胃肠道不良反应
用PRADAXA 150 mg患者胃肠道不良反应发生率增加(35%相比24%用华法林)。这些为常见的消化不良(包括上腹痛,腹痛,腹部不适,和胃脘不适)和胃炎样症状(包括GERD,食道炎,腐蚀性胃炎,胃出血,出血性胃炎,出血性腐蚀性胃炎,和胃肠道溃疡)。
超敏性反应
在RE-LY研究中,在<0.1%接受PRADAXA患者报道药物超敏性(包括荨麻疹,皮疹,和瘙痒),过敏性水肿,过敏反应,和过敏性休克。
6.2 上市后经验
批准后使用PRADAXA期间曾鉴定以下不良反应。因为这些反应是从人群大小不确定自愿报告的,经常不可能可靠估计它们的频数或确定与药物暴露因果相互关系。在批准后使用PRADAXA曾鉴定以下不良反应:血管水肿。
7 药物相互作用
PRADAXA与P-gp诱导剂(如,利福平)的同时使用减低对达比加群暴露和一般说来应避免[见临床药理学(12.3)]。
P-gp抑制作用和损伤肾功能是导致对达比加群暴露增加主要独立因子[见临床药理学(12.3)]。有肾受损患者中同时使用P-gp抑制剂与任何单独因子所见比较预计产生达比加群暴露增加。
有 中度肾受损(CrCl 30-50 mL/min)患者,当同时地与P-gp抑制剂决奈达隆或全身性酮康唑给药,考虑减低PRADAXA剂量至75 mg每天2次。The use of P-gp抑制剂(维拉帕米[verapamil],胺碘酮[amiodarone],奎尼丁[quinidine],和克拉霉素 [clarithromycin])的使用不需要调整PRADAXA剂量。这些结果不应外推至其他P-gp抑制剂[见警告和注意事项(5.4),在特殊人 群中使用(8.6),和临床药理学(12.3)]。
应避免在有严重肾受损患者(CrCl 15-30 mL/min)同时使用PRADAXA和P-gp抑制剂[见警告和注意事项(5.4),在特殊人群中使用(8.6),和临床药理学(12.3)]。
8 在特殊人群中使用
8.1 妊娠
妊娠类别C
在妊娠妇女中没有适当和对照良好研究.
当 雄性和雌性大鼠在交配前和至植入(怀孕第6天)用剂量70 mg/kg处理曾显示达比加群减低植入数(根据曲线下面积[AUC]比较在最大推荐人剂量[MRHD]300 mg/day人暴露的约2.6至3.0倍)。妊娠大鼠植入后用达比加群在相同剂量治疗增加死亡子代数和致过量阴道/子宫出血 接近分娩。尽管在大鼠中达比加群增加胎畜颅骨和脊椎延迟或不规则骨化的发生率,在大鼠和兔中不引起重大畸形。
8.2 生产和分娩
在临床试验中未曾研究生产和分娩期间PRADAXA的安全性和有效性。考虑在这种情况中用PRADAXA出血和卒中的风险[见警告和注意事项(5.1)]。
妊娠大鼠从植入(怀孕第7天)至断奶(哺乳第21天)期间用达比加群在剂量70 mg/kg(根据AUC比较在MRHD 300 mg/day人暴露约2.6倍)治疗生产期间子代和母大鼠的死亡伴子宫出血。
8.3 哺乳母亲
不知道达比加群是否排泄在人乳汁中。因为许多药物排泄在人乳汁,当PRADAXA被给予哺乳妇女应小心对待。
8.4 儿童使用
尚未确定PRADAXA在儿童患者的安全性和有效性。
8.5 老年人使用
在RE-LY研究患者总数中,82%为65和以上,而40%为75和以上。随年龄卒中和出血风险增加,但在所有年龄组风险-获益图形有利[见警告和注意事项(5),不良反应(6.1),和临床研究(14)]。
8.6 肾受损
在 有轻度或中度肾受损患者建议无需调整PRADAXA的剂量[见临床药理学(12.3)]。在有严重肾受损患者减低PRADAXA剂量(CrCl 15-30 mL/min) [见剂量和给药方法(2.1,2.2)和临床药理学(12.3)]。对有CrCl <15 mL/min或透析患者不能提供给药建议。
在有肾受损同时接受P-gp抑制剂患者适当调整剂量[见警告和注意事项(5.4),药物相互作用(7),和临床药理学(12.3)]。
10 药物过量
意 外过量可能导致出血性并发症。对达比加群没有逆转剂。在出血性并发症事件中,初始适当临床支持,终止用PRADAXA治疗,和研究出血来源。达比加群主要 通过肾脏消除与低血浆蛋白结合约35%。血液透析可能去除达比加群。但是,支持这个方法数据有限。利用高流量透析器,血液流动速率200 mL/min,和透析液流速700 mL/min,经历4小时从血浆可清除总达比加群的约49%。在相同透析液流速,利用透析器血液流动速率300 mL/min可清除约57%,在较高流速没有显著增加观察到清除率。停止血液透析,见到再分别效应约7%至15%。预计透析对达比加群的血浆浓度的影响将 根据患者特殊特征变化。活化部分凝血活酶时间(aPTT)或蝰蛇毒凝血时间(ECT)的测量可能有助于指导治疗[见警告和注意事项(5.1)和临床药理学 (12.2)]。
11 一般描述
对 甲磺酸达比加群酯[Dabigatran etexilate mesylate],a 直接凝血酶抑制剂,的化学名is乙基3 - {[(2 - {[(4 - { N ' -己基氧基羰基的氨基甲酰基亚氨基}苯基)氨基]甲基} -1 -甲基-1 H -苯并咪唑-5 -基)羰基](吡啶-2 -基氨基)丙酸乙酯b-Alanine,N-[[2-[[[4-[[[(hexyloxy)carbonyl]amino]iminomethyl] enyl]amino]methyl]-1-methyl-1H-benzimidazol-5-yl]carbonyl]-N-2-pyridinyl-,ethyl ester,methanesulfonate. 经验式为C34H41N7O5•CH4O3S和分子量723.86(甲磺酸盐),627.75(游离碱). 结构式为:
甲磺酸达比加群酯是一种黄-白至黄粉。一个在纯水中饱和溶液溶解度为1.8 mg/mL。它自由溶于甲醇,微溶于乙醇,和略微溶于异丙醇。.
口 服给药的150 mg胶囊含172.95 mg甲磺酸达比加群酯,等同于150 mg达比加群酯,和以下无活性成分:阿拉伯树胶,二甲基硅油,羟丙甲纤维素,羟基丙基纤维素,滑石,和酒石酸。胶囊壳由角叉菜胶,FD&C蓝 No. 2 (仅150 mg),FD&C黄No. 6,羟丙甲纤维素,氯化钾,二氧化钛,和黑色可食用油墨组成。75 mg胶囊含86.48 mg甲磺酸达比加群酯,等同于75 mg达比加群酯,和别的相似与150 mg胶囊。
12 临床药理学
12.1 作用机制
达比加群及其酰基葡萄糖醛酸苷是竞争性,直接凝血酶抑制剂。因为凝血酶(丝氨酸蛋白酶) 在凝血级联反应时使纤维蛋白原转化为纤维蛋白,其抑制作用防止血栓发展。Both游离和凝块-结合的凝血酶,和凝血酶-诱发血小板聚集被这个活性部位抑制。
12.2 药效动力学
在建议的治疗剂量,达比加群酯延长凝固标志物例如活化部分凝血活酶时间(aPTT),蝰蛇毒凝血时间(ECT),和凝血酶时间(TT)。对暴露于达比加群INR相对不敏感和不能如同用于对华法林监测相同方法解释。
aPTT 检验提供一个近似的PRADAXA抗凝效应。在图1中显示在有不同程度肾受损患者中批准给药方案后对aPTT效应的平均时间过程。曲线代表均数水平无可信 区间;当测量活化部分凝血活酶时间(aPTT)应预计变异。而不能提供任何特殊临床情况中需要的aPTT回收水平,曲线可用于估计得到特殊回收水平的时 间,甚至当不能精确知道自末次剂量PRADAXA时间 。在RE-LY试验中,接受150 mg剂量患者谷中位数(10th至90th 百分位)为52(40至76)秒。
图 1 平均时间过程对达比加群对活化部分凝血活酶时间(aPTT)的影响,被批准PRADAXA给药方案后在有各种程度肾受损患者中*
* 模拟根据PK数据来自一项研究在有肾受损受试者中和PK/活化部分凝血活酶时间(aPTT)相互关系来自RE-LY研究;在RE-LY中aPTT 延长是集中在枸橼酸盐血浆中用PTT试剂Roche Diagnostics GmbH,Mannheim,Germany测定。各种建立的方法对aPTT评估间可能存在定量差别。
通过蝰蛇毒凝血时间也可评估抗凝活性的程 度。这个检验比活化部分凝血活酶时间(activated partial thromboplastin time, aPTT)更特异性测定达比加群的效应。在RE-LY试验中,接受150 mg剂量患者中低谷ECT中位(10th至90th 百分位)为63(44至103)秒。
心脏电生理学
用达比加群酯剂量达600 mg未观察到QTc间期延长。
12.3 药代动力学
甲 磺酸达比加群酯作为达比加群酯被吸收。然后这个酯被水解,形成活性部分达比加群。达比加群被代谢为四个不同的酰基葡萄糖醛酸和葡萄糖醛酸和达比加群两者有 相似药理学活性。在此描述的药代动力学是指达比加群及其葡萄糖醛酸结合物之和。在健康受试者中和患者在剂量范围从10至400 mg时达比加群显示剂量正比例药代动力学。
吸收
达 比加群口服给药后达比加群酯的绝对生物利用度为约3至7%。达比加群酯是流出转运蛋白P-gp的底物。在健康志愿者中口服给予达比加群酯后,在空腹状态 Cmax出现在给药后1小时。PRADAXA与高脂肪餐共同给药延迟达Cmax时间约2小时但对达比加群的生物利用度无影响;PRADAXA可有或无食物 给予。.
当用无胶囊壳药丸与完整胶囊配方比较时达比加群酯的口服生物利用度增加75%。所以给药前PRADAXA胶囊不应被破坏,咀嚼,或打开。
分布
约35%达比加群结合至人血浆蛋白。总放射性测量红细胞与血浆达比加群的分配小于0.3。达比加群的分布容积是是50至70 L。单剂量10至400 mg后达比加群药代动力学是剂量正比例。给予每天2次,达比加群的积蓄因子约为2。
消除
达比加群主要经尿消除。静脉给药后达比加群的肾清除率是总清除率的80%。放射标记达比加群口服给药后,尿中回收7%放射性和粪中86%。在健康受试者中达比加群的半衰期是12至17小时。
代谢
口 服给药后,达比加群酯被转换为达比加群。达比加群酯被酯酶催化水解裂解为主要活性成分达比加群是主要代谢反应。达比加群不是CYP450 酶系的底物,抑制剂,或诱导剂。达比加群被结合形成药理学上活性的乙酰葡萄糖醛酸结合物。存在四个位置同分异构体,1-O,2-O,3-O,和4-O-乙 酰葡萄糖醛酸结合物,和每个占小于血浆总达比加群10%。
肾受损
一项开放,平行组单中心研究在健康受试者和有轻度至中度肾受损患者接受单剂量PRADAXA 150 mg比较达比加群的药代动力学。暴露至达比加群随肾功能损伤严重程度增加(表3)。在RE-LY试验观察到发现相似。
有严重肾受损受试者中给药建议是根据药代动力学模型分析[见剂量和给药方法(2.1)和在特殊人群中使用(8.6)]。
肝受损
在有中度肝受损患者(Child-Pugh B) PRADAXA给药显示巨大受试者间变异性,但没有暴露或药效学一致变化的证据。
药物相互作用
其他药物对达比加群的影响
P-gp诱导剂
利福平:利福平600 mg每天1次共7天接着单剂量达比加群AUC和Cmax分别减低66%和67%。停止利福平治疗后第7天,达比加群暴露是接近正常[见警告和注意事项(5.4)和药物相互作用(7)]。
P-gp抑制剂
在用P-gp抑制剂酮康唑,胺碘酮,维拉帕米,和奎尼丁研究中,达峰时间,末端半衰期,和达比加群平均驻留时间不受影响。下面描述观察到Cmax和AUC的任何变化。
决奈达隆:达比加群酯和决奈达隆同时给药(给1次或每天2次)与单独达比加群比较增加达比加群暴露70至140%。当达比加群酯后2小时给予决奈达隆时与单独达比加群比较暴露增加仅较高30至60%。
酮康唑:全身性酮康唑单剂量400 mg后增加达比加群AUC和Cmax值分别138%和135%而多剂量每天剂量400 mg后分别153%和149%。
维拉帕米: 当达比加群酯与口服维拉帕米共同给药时,达比加群的Cmax和AUC增加。增加的程度依赖于维拉帕米的制剂和给药时间。当达比加群服药时如维拉帕米存在于 肠道,当在达比加群给药前1小时给予一种单剂量立即释放维拉帕米,观察到将对达比加群暴露增加最大增加(AUC增加2.4倍)。如果在达比加群后2小时给 予维拉帕米,AUC增加可忽略不计。从RE-LY群体药代动力学研究,接受维拉帕米患者未观察到达比加群谷水平重要变化。
胺碘酮: 当达比加群酯与单次600 mg口服剂量胺碘酮共同给药,达比加群的AUC和Cmax分别增加58%和50%。存在胺碘酮时达比加群的肾清除率增加65%暴露增加被缓解。胺碘酮终止 后因为胺碘酮的长半衰期肾清除率增加可能持续。在来自RE-LY群体药代动力学研究,接受胺碘酮患者中未观察到达比加群谷水平重要变化。
奎尼丁:每2小时给予奎尼丁200 mg剂量达总量1000 mg。连续3天达比加群酯,在第3天最末剂量给药前有或无奎尼丁。同时奎尼丁给药分别增加达比加群的AUC和Cmax为53%和56%。
克拉霉素:克拉霉素的共同给药对达比加群暴露没有影响。
其他药物
氯吡格雷[Clopidogrel]: 当达比加群酯同时地给予负荷剂量300 mg或600 mg氯吡格雷,达比加群AUC和Cmax分别增加约30%和40%。同时给予达比加群酯和氯吡格雷与氯吡格雷单药治疗比较未导致毛细血管出血时间进一步延 长。当联合治疗和相应的单药-治疗比较,对达比加群的效应凝固测量(活化部分凝血活酶时间(aPTT),蝰蛇毒凝血时间(ECT),和凝血酶时间 (TT)) 保持未变化,和血小板凝聚(IPA)的抑制作用,氯吡格雷效应的测量,保持不变。
依诺肝素[Enoxaparin]:皮下给予依诺肝素40 mg共3天,末次剂量在单剂量PRADAXA前24小时,对达比加群暴露或凝固测量活化部分凝血活酶时间(aPTT),蝰蛇毒凝血时间(ECT),或凝血酶时间(TT)没有影响。
双氯芬酸[Diclofenac],雷尼替丁[Ranitidine],和地高辛[Digoxin]:这些药物没有一个改变对达比加群暴露。
在RE-LY试验中,也收集达比加群血浆样品。同时使用质子泵抑制剂,H2拮抗剂,和地高辛达比加群的谷浓度没有明显变化。.
达比加群对其他药物的影响
在临床研究探索CYP3A4,CYP2C9,P-gp和其他通路,达比加群没有有意义地改变胺碘酮,阿托伐他汀[atorvastatin],克拉霉素,双氯芬酸,氯吡格雷,地高辛,泮托拉唑[pantoprazole],或雷尼替丁[ranitidine]的药代动力学
13 非临床毒理学
13.1 癌发生,突变发生,生育能力受损
当小鼠和大鼠经口灌服给药直至2年达比加群不是致癌剂。小鼠和大鼠最受试高剂量(200 mg/kg/day)根据AUC比较分别为人在MRHD 300 mg/day暴露约3.6和6倍。
在体外试验中,包括细菌回复突变试验,小鼠淋巴瘤试验和人淋巴细胞染色体畸变试验,和在体内大鼠微核试验,达比加群不是致突变剂。
大 鼠生育能力研究经口灌服剂量15,70,和200 mg/kg,雄性交配前处理29天,交配期间直至计划终止,和雌性交配前处理15天至怀孕第6天。在200 mg/kg或根据AUC比较分别为人在MRHD 300 mg/day暴露的9至12倍未观察到对雄性和雌性生育能力不良效应。但是,雌性接受70 mg/kg,或根据AUC比较分别为人在MRHD 300 mg/day暴露的3倍植入数减低。
14 临床研究
对 PRADAXA疗效的临床证据是来自RE-LY(长期抗凝治疗的随机化评价),一项多中心,多国,随机化平行组试验比较两个盲态PRADAXA剂量 (110 mg 每天2次和150 mg 每天2次)与开放华法林(给药至目标INR 2至3)在有非瓣膜,持久,阵发性,或永久性房颤患者和1或更多以下另外风险因子:
● 既往卒中,短暂性脑缺血发作(TIA),或全身性栓塞
● 左室射血分量 <40%
● 症状性心衰,≥ 纽约心脏协会分级2
● 年龄 ≥75岁
● 年龄 ≥65岁和以下一种疾病状态:糖尿病,冠状动脉疾病(CAD),或高血压
本研究的主要目的是确定PRADAXA在减低复合终点的发生,卒中(缺血和出血)和全身性栓塞是否不劣于华法林。研究被设计确保PRADAXA保留50%以上既往华法林房颤随机化,安慰剂-对照试验确定的华法林效应。也分析统计优越性。
总 共18,113患者被随机化和随访中位2年。患者的均数年龄为71.5岁和均数CHADS2计分为2.1。患者人群为64%男性,70%高加索人,16% 亚裔,和1%黑人。12%患者有卒中或短暂性脑缺血发作(TIA)史和50%未用过维生素K拮抗剂(VKA),被定义为暴露于一种VKA少于总寿命2个 月。人群的32%从来未暴露于VKA。本试验中患者同时患病包括高血压79%,糖尿病23%,,和冠心病CAD 28%。在基线时,40%患者用阿司匹林[aspirin, ASA]和6%用氯吡格雷。对随机化至华法林患者,在治疗范围中时间的均数百分率(INR 2至3)为64%。
相对于华法林和对PRADAXA 110 mg每天2次,PRADAXA 150 mg每天2次显著减低卒中和全身性栓塞主要复合终点(见表4和图2).
图2 :至首次卒中或全身性栓塞时间估计值的Kaplan-Meier曲线
表5中显示按亚型复合终点的组分,包括卒中的贡献。治疗效应主要是减低卒中。PRADAXA 150 mg每天2次减低缺血性和出血性卒中相对优于华法林。
一般说来,跨越主要亚组PRADAXA 150 mg每天2次的疗效恒定一致(见图3)。
图3 按基线特征卒中和全身性栓塞的危害比
在RE-LY中,接受PRADAXA患者(0.7每100患者-年对150 mg剂量)比接受华法林患者报道心肌临床梗死率较高(0.6)。
16 如何供应/贮存和处置
PRADAXA 75 mg胶囊有奶油色的不透明帽印有Boehringer Ingelheim公司符号和奶油色不透明体印有“R75”。所印颜色为黑色。以包装供应胶囊如下:
● NDC 0597-0149-54 60粒胶囊瓶使用单元
● NDC 0597-0149-60 泡包装含60粒胶囊 (10 × 6 胶囊泡卡)
PRADAXA 150 mg胶囊有淡蓝色的不透明帽印有Boehringer Ingelheim公司符号和奶油色不透明体印有“R150”。所印颜色是黑色。以包装供应胶囊如下:
● NDC 0597-0135-54 60粒胶囊瓶使用单元
● NDC 0597-0135-60泡包装含60粒胶囊 (10 × 6 胶囊泡卡)
瓶
贮存在25°C (77°F);外出允许至15°-30°C (59°-86°F)。一旦打开,产品必须在4个月内使用。保存在紧闭瓶内。贮存在原始包装保护防潮湿。
泡
泡包装含60粒胶囊 (10 × 6 胶囊泡卡)。贮存在原始包装保护防潮湿。
保存在儿童不能达到的地方。
17 患者咨询资料
见FDA-批准的患者说明书(用药指南)
17.1对患者指导
● 告诉患者确切地按处方用PRADAXA。
● 提醒患者未经开处方的卫生保健提供者不得终止PRADAXA。
● 保持PRADAXA在原瓶防潮湿。不要放RADAXA在药丸和或药丸组织器内。.
● 当分发给患者1瓶以上时,指导他们每次只打开1瓶。
● 指导患者使用时只从已打开瓶去除1粒胶囊。瓶子立即紧密封闭。
● 忠告患者吞服时不要咀嚼或破坏胶囊和不要打开胶囊和单独服药丸。
17.2 出血
告知患者可能容易出血,出血可能较长,对任何出血体征或症状和应脚卫生保健提供者。
指导患者如有下列任何可能是严重出血体征或症状立即紧急求医:
● 不寻常瘀伤(不知道原因的瘀伤或越来越大)
● 粉红或棕色尿
● 红色或黑色,柏油样变
● 咳出血
● 吐血,或呕吐像咖啡渣物
指导患者如经受任何出血体征或症状电话给卫生保健提供者或及时求医:
● 关节疼痛,肿胀或不适
● 头痛,眩晕,或软弱
● 再三反复鼻血
● 不寻常牙龈出血
● 来自切口出血长时间才停止
● 月经出血或阴道出血比正常严重
17.3 胃肠道不良反应
指导患者如他们经受消化不良或胃炎任何体征或症状电话他们的卫生保健提供者:
● 消化不良(胃部不适),烧灼,或恶心
● 腹痛或不适
● 胃脘不适,GERD(胃消化不良)
17.4 侵入性或外科手术
指导患者计划任何侵入性 手术(包括牙科手术)前服用PRADAXA告知他们的卫生保健提供者。
17.5 同时药物
询问患者列出他们用的或计划用的所有处方药,非处方药,或食物补充剂所以卫生保健提供者已知关于可能影响出血风险其他治疗(如,阿司匹林或NSAIDs)或达比加群暴露(如,决奈达隆或全身性酮康唑)。
17.6 人工心脏瓣膜
指导患者如他们将有或有放置人工心脏瓣膜手术告知他们的卫生保健提供者
Generic Name: dabigatran etexilate mesylate
Dosage Form: capsule
WARNING: (A) PREMATURE DISCONTINUATION OF Pradaxa INCREASES THE RISK OF THROMBOTIC EVENTS, and (B) SPINAL/EPIDURAL HEMATOMA
(A) PREMATURE DISCONTINUATION OF Pradaxa INCREASES THE RISK OF
THROMBOTIC EVENTS
Premature
discontinuation of any oral anticoagulant, including Pradaxa, increases the
risk of thrombotic events. If anticoagulation with Pradaxa is discontinued for
a reason other than pathological bleeding or completion of a course of therapy,
consider coverage with another anticoagulant [see
Dosage and Administration (2.4, 2.5, 2.6) and Warnings and Precautions (5.1)].
(B)
SPINAL/EPIDURAL HEMATOMA
Epidural
or spinal hematomas may occur in patients treated with Pradaxa who are
receiving neuraxial anesthesia or undergoing spinal puncture. These hematomas
may result in long-term or permanent paralysis. Consider these risks when
scheduling patients for spinal procedures. Factors that can increase the risk
of developing epidural or spinal hematomas in these patients include:
•
use of indwelling epidural catheters
•
concomitant use of other drugs that affect hemostasis, such as non-steroidal
anti-inflammatory drugs (NSAIDs), platelet inhibitors, other anticoagulants
•
a history of traumatic or repeated epidural or spinal punctures
•
a history of spinal deformity or spinal surgery
•
optimal timing between the administration of Pradaxa and neuraxial procedures
is not known [see Warnings and Precautions (5.3)].
Monitor
patients frequently for signs and symptoms of neurological impairment. If
neurological compromise is noted, urgent treatment is necessary [see Warnings and
Precautions (5.3)].
Consider
the benefits and risks before neuraxial intervention in patients anticoagulated
or to be anticoagulated [see Warnings
and Precautions (5.3)].
Pradaxa is indicated to reduce the risk of stroke and systemic embolism in patients with non-valvular atrial fibrillation.
Pradaxa is indicated for the treatment of deep venous thrombosis and pulmonary embolism in patients who have been treated with a parenteral anticoagulant for 5-10 days.
Pradaxa is indicated to reduce the risk of recurrence of deep venous thrombosis and pulmonary embolism in patients who have been previously treated.
Pradaxa is indicated for the prophylaxis of deep vein thrombosis and pulmonary embolism, in patients who have undergone hip replacement surgery.
Indication |
Dosage |
|
Reduction in Risk of Stroke and Systemic Embolism in Non-valvular AF |
CrCl >30 mL/min: |
150 mg twice daily |
CrCl 15 to 30 mL/min: |
75 mg twice daily |
|
CrCl <15 mL/min or on dialysis: |
Dosing recommendations cannot be provided |
|
CrCl 30 to 50 mL/min with concomitant use of P-gp inhibitors: |
Reduce dose to 75 mg twice daily if given with P-gp inhibitors dronedarone or systemic ketoconazole. |
|
CrCl <30 mL/min with concomitant use of P-gp inhibitors: |
Avoid co-administration |
|
Treatment of DVT and PE |
CrCl >30 mL/min: |
150 mg twice daily |
CrCl ≤30 mL/min or on dialysis: |
Dosing recommendations cannot be provided |
|
CrCl <50 mL/min with concomitant use of P-gp inhibitors: |
Avoid co-administration |
|
Prophylaxis of DVT and PE Following Hip Replacement Surgery |
CrCl >30 mL/min: |
110 mg for first day, then 220 mg once daily |
CrCl ≤30 mL/min or on dialysis: |
Dosing recommendations cannot be provided |
|
CrCl <50 mL/min with concomitant use of P-gp inhibitors: |
Avoid co-administration |
Reduction of Risk of Stroke and Systemic Embolism in Non-valvular Atrial Fibrillation
For patients with creatinine clearance (CrCl) >30 mL/min, the recommended dose of Pradaxa is 150 mg taken orally, twice daily. For patients with severe renal impairment (CrCl 15-30 mL/min), the recommended dose of Pradaxa is 75 mg twice daily [see Use in Specific Populations (8.6) and Clinical Pharmacology (12.3)]. Dosing recommendations for patients with a CrCl <15 mL/min or on dialysis cannot be provided.
Treatment of Deep Venous Thrombosis and Pulmonary Embolism
For patients with CrCl >30 mL/min, the recommended dose of Pradaxa is 150 mg taken orally, twice daily, after 5-10 days of parenteral anticoagulation. Dosing recommendations for patients with a CrCl ≤30 mL/min or on dialysis cannot be provided [see Use in Specific Populations (8.6) and Clinical Pharmacology (12.3)].
Reduction in the Risk of Recurrence of Deep Venous Thrombosis and Pulmonary Embolism
For patients with CrCl >30 mL/min, the recommended dose of Pradaxa is 150 mg taken orally, twice daily after previous treatment. Dosing recommendations for patients with a CrCl ≤30 mL/min or on dialysis cannot be provided [see Use in Specific Populations (8.6) and Clinical Pharmacology (12.3)].
Prophylaxis of Deep Vein Thrombosis and Pulmonary Embolism Following Hip Replacement Surgery
For patients with CrCl >30 mL/min, the recommended dose of Pradaxa is 110 mg taken orally 1-4 hours after surgery and after hemostasis has been achieved, then 220 mg taken once daily for 28-35 days. If Pradaxa is not started on the day of surgery, after hemostasis has been achieved initiate treatment with 220 mg once daily. Dosing recommendations for patients with a CrCl ≤30 mL/min or on dialysis cannot be provided [see Use in Specific Populations (8.6) and Clinical Pharmacology (12.2, 12.3)].
Assess renal function prior to initiation of treatment with Pradaxa. Periodically assess renal function as clinically indicated (i.e., more frequently in clinical situations that may be associated with a decline in renal function) and adjust therapy accordingly. Discontinue Pradaxa in patients who develop acute renal failure while on Pradaxa and consider alternative anticoagulant therapy.
Generally, the extent of anticoagulation does not need to be assessed. When necessary, use aPTT or ECT, and not INR, to assess for anticoagulant activity in patients on Pradaxa [see Warnings and Precautions (5.2) and Clinical Pharmacology (12.2)].
Reduction of Risk of Stroke and Systemic Embolism in Non-valvular Atrial Fibrillation
In patients with moderate renal impairment (CrCl 30-50 mL/min), concomitant use of the P-gp inhibitor dronedarone or systemic ketoconazole can be expected to produce dabigatran exposure similar to that observed in severe renal impairment. Reduce the dose of Pradaxa to 75 mg twice daily [see Warnings and Precautions (5.5), Drug Interactions (7.1) and Clinical Pharmacology (12.3)].
Treatment and Reduction in the Risk of Recurrence of Deep Venous Thrombosis and Pulmonary Embolism
Dosing recommendations for patients with CrCl ≤30 mL/min cannot be provided. Avoid use of concomitant P-gp inhibitors in patients with CrCl <50 mL/min [see Warnings and Precautions (5.5), Drug Interactions (7.2) and Clinical Pharmacology (12.3)].
Prophylaxis of Deep Vein Thrombosis and Pulmonary Embolism Following Hip Replacement Surgery
Dosing recommendations for patients with CrCl ≤30 mL/min or on dialysis cannot be provided. Avoid use of concomitant P-gp inhibitors in patients with CrCl <50 mL/min [see Warnings and Precautions (5.5), Drug Interactions (7.3) and Clinical Pharmacology (12.2, 12.3)].
Instruct patients to swallow the capsules whole. Pradaxa should be taken with a full glass of water. Breaking, chewing, or emptying the contents of the capsule can result in increased exposure [see Clinical Pharmacology (12.3)].
If a dose of Pradaxa is not taken at the scheduled time, the dose should be taken as soon as possible on the same day; the missed dose should be skipped if it cannot be taken at least 6 hours before the next scheduled dose. The dose of Pradaxa should not be doubled to make up for a missed dose.
When converting patients from warfarin therapy to Pradaxa, discontinue warfarin and start Pradaxa when the INR is below 2.0.
When converting from Pradaxa to warfarin, adjust the starting time of warfarin based on creatinine clearance as follows:
· For CrCl ≥50 mL/min, start warfarin 3 days before discontinuing Pradaxa.
· For CrCl 30-50 mL/min, start warfarin 2 days before discontinuing Pradaxa.
· For CrCl 15-30 mL/min, start warfarin 1 day before discontinuing Pradaxa.
· For CrCl <15 mL/min, no recommendations can be made.
Because Pradaxa can increase INR, the INR will better reflect warfarin’s effect only after Pradaxa has been stopped for at least 2 days [see Clinical Pharmacology (12.2)].
For patients currently receiving a parenteral anticoagulant, start Pradaxa 0 to 2 hours before the time that the next dose of the parenteral drug was to have been administered or at the time of discontinuation of a continuously administered parenteral drug (e.g., intravenous unfractionated heparin).
For patients currently taking Pradaxa, wait 12 hours (CrCl ≥30 mL/min) or 24 hours (CrCl <30 mL/min) after the last dose of Pradaxa before initiating treatment with a parenteral anticoagulant [see Clinical Pharmacology (12.3)].
If possible, discontinue Pradaxa 1 to 2 days (CrCl ≥50 mL/min) or 3 to 5 days (CrCl <50 mL/min) before invasive or surgical procedures because of the increased risk of bleeding. Consider longer times for patients undergoing major surgery, spinal puncture, or placement of a spinal or epidural catheter or port, in whom complete hemostasis may be required [see Use in Specific Populations (8.6) and Clinical Pharmacology (12.3)].
If surgery cannot be delayed, there is an increased risk of bleeding [see Warnings and Precautions (5.2)]. This risk of bleeding should be weighed against the urgency of intervention [see Warnings and Precautions (5.1, 5.3)]. Use a specific reversal agent (idarucizumab) in case of emergency surgery or urgent procedures when reversal of the anticoagulant effect of dabigatran is needed. Refer to the idarucizumab prescribing information for additional information. Restart Pradaxa as soon as medically appropriate.
150 mg capsules with a light blue opaque cap imprinted in black with the Boehringer Ingelheim company symbol and a white opaque body imprinted in black with “R150”.
110 mg capsules with a light blue opaque cap imprinted in black with the Boehringer Ingelheim company symbol and a light blue opaque body imprinted in black with “R110”.
75 mg capsules with a white opaque cap imprinted in black with the Boehringer Ingelheim company symbol and a white opaque body imprinted in black with “R75”.
Pradaxa is contraindicated in patients with:
· Active pathological bleeding [see Warnings and Precautions (5.2) and Adverse Reactions (6.1)].
· History of a serious hypersensitivity reaction to Pradaxa (e.g., anaphylactic reaction or anaphylactic shock) [see Adverse Reactions (6.1)].
· Mechanical prosthetic heart valve [see Warnings and Precautions (5.4)].
Premature discontinuation of any oral anticoagulant, including Pradaxa, in the absence of adequate alternative anticoagulation increases the risk of thrombotic events. If Pradaxa is discontinued for a reason other than pathological bleeding or completion of a course of therapy, consider coverage with another anticoagulant and restart Pradaxa as soon as medically appropriate [see Dosage and Administration (2.4, 2.5, 2.6)].
Pradaxa increases the risk of bleeding and can cause significant and, sometimes, fatal bleeding. Promptly evaluate any signs or symptoms of blood loss (e.g., a drop in hemoglobin and/or hematocrit or hypotension). Discontinue Pradaxa in patients with active pathological bleeding [see Dosage and Administration (2.2)].
Risk factors for bleeding include the concomitant use of other drugs that increase the risk of bleeding (e.g., anti-platelet agents, heparin, fibrinolytic therapy, and chronic use of NSAIDs). Pradaxa’s anticoagulant activity and half-life are increased in patients with renal impairment [see Clinical Pharmacology (12.2)].
Reversal of Anticoagulant Effect:
A specific reversal agent (idarucizumab) for dabigatran is available when reversal of the anticoagulant effect of dabigatran is needed:
· For emergency surgery/urgent procedures
· In life-threatening or uncontrolled bleeding
Hemodialysis can remove dabigatran; however the clinical experience supporting the use of hemodialysis as a treatment for bleeding is limited [see Overdosage (10)]. Prothrombin complex concentrates, or recombinant Factor VIIa may be considered but their use has not been evaluated in clinical trials. Protamine sulfate and vitamin K are not expected to affect the anticoagulant activity of dabigatran. Consider administration of platelet concentrates in cases where thrombocytopenia is present or long-acting antiplatelet drugs have been used.
When neuraxial anesthesia (spinal/epidural anesthesia) or spinal puncture is employed, patients treated with anticoagulant agents are at risk of developing an epidural or spinal hematoma which can result in long-term or permanent paralysis [see Boxed Warning].
To reduce the potential risk of bleeding associated with the concurrent use of dabigatran and epidural or spinal anesthesia/analgesia or spinal puncture, consider the pharmacokinetic profile of dabigatran [see Clinical Pharmacology (12.3)]. Placement or removal of an epidural catheter or lumbar puncture is best performed when the anticoagulant effect of dabigatran is low; however, the exact timing to reach a sufficiently low anticoagulant effect in each patient is not known.
Should the physician decide to administer anticoagulation in the context of epidural or spinal anesthesia/analgesia or lumbar puncture, monitor frequently to detect any signs or symptoms of neurological impairment, such as midline back pain, sensory and motor deficits (numbness, tingling, or weakness in lower limbs), bowel and/or bladder dysfunction. Instruct patients to immediately report if they experience any of the above signs or symptoms. If signs or symptoms of spinal hematoma are suspected, initiate urgent diagnosis and treatment including consideration for spinal cord decompression even though such treatment may not prevent or reverse neurological sequelae.
The safety and efficacy of Pradaxa in patients with bileaflet mechanical prosthetic heart valves was evaluated in the RE-ALIGN trial, in which patients with bileaflet mechanical prosthetic heart valves (recently implanted or implanted more than three months prior to enrollment) were randomized to dose adjusted warfarin or 150, 220, or 300 mg of Pradaxa twice a day. RE-ALIGN was terminated early due to the occurrence of significantly more thromboembolic events (valve thrombosis, stroke, transient ischemic attack, and myocardial infarction) and an excess of major bleeding (predominantly post-operative pericardial effusions requiring intervention for hemodynamic compromise) in the Pradaxa treatment arm as compared to the warfarin treatment arm. These bleeding and thromboembolic events were seen both in patients who were initiated on Pradaxa post-operatively within three days of mechanical bileaflet valve implantation, as well as in patients whose valves had been implanted more than three months prior to enrollment. Therefore, the use of Pradaxa is contraindicated in patients with mechanical prosthetic valves [see Contraindications (4)].
The use of Pradaxa for the prophylaxis of thromboembolic events in patients with atrial fibrillation in the setting of other forms of valvular heart disease, including the presence of a bioprosthetic heart valve, has not been studied and is not recommended.
The concomitant use of Pradaxa with P-gp inducers (e.g., rifampin) reduces exposure to dabigatran and should generally be avoided [see Clinical Pharmacology (12.3)].
P-gp inhibition and impaired renal function are the major independent factors that result in increased exposure to dabigatran [see Clinical Pharmacology (12.3)]. Concomitant use of P-gp inhibitors in patients with renal impairment is expected to produce increased exposure of dabigatran compared to that seen with either factor alone.
Reduction of Risk of Stroke and Systemic Embolism in Non-valvular Atrial Fibrillation
Reduce the dose of Pradaxa to 75 mg twice daily when dronedarone or systemic ketoconazole is coadministered with Pradaxa in patients with moderate renal impairment (CrCl 30-50 mL/min). Avoid use of Pradaxa and P-gp inhibitors in patients with severe renal impairment (CrCl 15-30 mL/min) [see Drug Interactions (7.1) and Use in Specific Populations (8.6)].
Treatment and Reduction in the Risk of Recurrence of Deep Venous Thrombosis and Pulmonary Embolism
Avoid use of Pradaxa and concomitant P-gp inhibitors in patients with CrCl <50 mL/min [see Drug Interactions (7.2) and Use in Specific Populations (8.6)].
Prophylaxis of Deep Vein Thrombosis and Pulmonary Embolism Following Hip Replacement Surgery
Avoid use of Pradaxa and concomitant P-gp inhibitors in patients with CrCl <50 mL/min [see Drug Interactions (7.3) and Use in Specific Populations (8.6)].
The following serious adverse reactions are described elsewhere in the labeling:
· Increased Risk of Thrombotic Events after Premature Discontinuation [see Warnings and Precautions (5.1)]
· Risk of Bleeding [see Warnings and Precautions (5.2)]
· Spinal/Epidural Anesthesia or Puncture [see Warnings and Precautions (5.3)]
· Thromboembolic and Bleeding Events in Patients with Prosthetic Heart Valves [see Warnings and Precautions (5.4)]
The most serious adverse reactions reported with Pradaxa were related to bleeding [see Warnings and Precautions (5.2)].
Because clinical trials are conducted under widely varying conditions, adverse reactions rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
Reduction of Risk of Stroke and Systemic Embolism in Non-valvular Atrial Fibrillation
The RE-LY (Randomized Evaluation of Long-term Anticoagulant Therapy) study provided safety information on the use of two doses of Pradaxa and warfarin [see Clinical Studies (14.1)]. The numbers of patients and their exposures are described in Table 1. Limited information is presented on the 110 mg dosing arm because this dose is not approved.
Table 1 Summary of Treatment Exposure in RE-LY |
||||
|
Pradaxa 110 mg twice daily |
Pradaxa 150 mg twice daily |
Warfarin |
|
Total number treated |
5983 |
6059 |
5998 |
|
Exposure |
|
|
|
|
|
> 12 months |
4936 |
4939 |
5193 |
|
> 24 months |
2387 |
2405 |
2470 |
Mean exposure (months) |
20.5 |
20.3 |
21.3 |
|
Total patient-years |
10,242 |
10,261 |
10,659 |
Drug Discontinuation in RE-LY
The rates of adverse reactions leading to treatment discontinuation were 21% for Pradaxa 150 mg and 16% for warfarin. The most frequent adverse reactions leading to discontinuation of Pradaxa were bleeding and gastrointestinal events (i.e., dyspepsia, nausea, upper abdominal pain, gastrointestinal hemorrhage, and diarrhea).
Bleeding [see Warnings and Precautions (5.2)]
Table 2 shows the number of adjudicated major bleeding events during the treatment period in the RE-LY study, with the bleeding rate per 100 subject-years (%). Major bleeding is defined as bleeding accompanied by one or more of the following: a decrease in hemoglobin of ≥2 g/dL, a transfusion of ≥2 units of packed red blood cells, bleeding at a critical site or with a fatal outcome. Intracranial hemorrhage included intracerebral (hemorrhagic stroke), subarachnoid, and subdural bleeds.
Table 2 Adjudicated Major Bleeding Events in Treated Patientsa |
|||
aPatients during treatment or within 2 days of stopping study treatment. Major bleeding events within each subcategory were counted once per patient, but patients may have contributed events to multiple subcategories. bAnnual event rate per 100 pt-years = 100 * number of subjects with event/subject-years. Subject-years is defined as cumulative number of days from first drug intake to event date, date of last drug intake + 2, death date (whatever occurred first) across all treated subjects divided by 365.25. In case of recurrent events of the same category, the first event was considered. cDefined as bleeding accompanied by one or more of the following: a decrease in hemoglobin of ≥2 g/dL, a transfusion of 2 or more units of packed red blood cells, bleeding at a critical site or with fatal outcome. dIntracranial bleed included intracerebral (hemorrhagic stroke), subarachnoid, and subdural bleeds. eOn-treatment analysis based on the safety population, compared to ITT analysis presented in Section 14 Clinical Studies. fFatal bleed: Adjudicated major bleed as defined above with investigator reported fatal outcome and adjudicated death with primary cause from bleeding. gNon-intracranial fatal bleed: Adjudicated major bleed as defined above and adjudicated death with primary cause from bleeding but without symptomatic intracranial bleed based on investigator’s clinical assessment. |
|||
Event |
Pradaxa 150 mg |
Warfarin |
Pradaxa 150 mg |
Major Bleedingc |
350 (3.47) |
374 (3.58) |
0.97 (0.84, 1.12) |
Intracranial Hemorrhage (ICH)d |
23 (0.22) |
82 (0.77) |
0.29 (0.18, 0.46) |
Hemorrhagic Strokee |
6 (0.06) |
40 (0.37) |
0.16 (0.07, 0.37) |
Other ICH |
17 (0.17) |
46 (0.43) |
0.38 (0.22, 0.67) |
Gastrointestinal |
162 (1.59) |
111 (1.05) |
1.51 (1.19, 1.92) |
Fatal Bleedingf |
7 (0.07) |
16 (0.15) |
0.45 (0.19, 1.10) |
ICH |
3 (0.03) |
9 (0.08) |
0.35 (0.09, 1.28) |
Non-intracranialg |
4 (0.04) |
7 (0.07) |
0.59 (0.17, 2.02) |
There was a higher rate of any gastrointestinal bleeds in patients receiving Pradaxa 150 mg than in patients receiving warfarin (6.6% vs. 4.2%, respectively).
The risk of major bleeds was similar with Pradaxa 150 mg and warfarin across major subgroups defined by baseline characteristics (see Figure 1), with the exception of age, where there was a trend towards a higher incidence of major bleeding on Pradaxa (hazard ratio 1.2, 95% CI: 1.0 to 1.5) for patients ≥75 years of age.
Figure 1 Adjudicated Major Bleeding by Baseline Characteristics Including Hemorrhagic Stroke Treated Patients
Note: The figure above presents effects in various subgroups all of which are baseline characteristics and all of which were pre-specified. The 95% confidence limits that are shown do not take into account how many comparisons were made, nor do they reflect the effect of a particular factor after adjustment for all other factors. Apparent homogeneity or heterogeneity among groups should not be over-interpreted.
Gastrointestinal Adverse Reactions
Patients on Pradaxa 150 mg had an increased incidence of gastrointestinal adverse reactions (35% vs. 24% on warfarin). These were commonly dyspepsia (including abdominal pain upper, abdominal pain, abdominal discomfort, and epigastric discomfort) and gastritis-like symptoms (including GERD, esophagitis, erosive gastritis, gastric hemorrhage, hemorrhagic gastritis, hemorrhagic erosive gastritis, and gastrointestinal ulcer).
Hypersensitivity Reactions
In the RE-LY study, drug hypersensitivity (including urticaria, rash, and pruritus), allergic edema, anaphylactic reaction, and anaphylactic shock were reported in <0.1% of patients receiving Pradaxa.
Treatment and Reduction in the Risk of Recurrence of Deep Venous Thrombosis and Pulmonary Embolism
Pradaxa was studied in 4387 patients in 4 pivotal, parallel, randomized, double-blind trials. Three of these trials were active-controlled (warfarin) (RE-COVER, RE-COVER II, and RE-MEDY), and one study (RE-SONATE) was placebo-controlled. The demographic characteristics were similar among the 4 pivotal studies and between the treatment groups within these studies. Approximately 60% of the treated patients were male, with a mean age of 55.1 years. The majority of the patients were white (87.7%), 10.3% were Asian, and 1.9% were black with a mean CrCl of 105.6 mL/min.
Bleeding events for the 4 pivotal studies were classified as major bleeding events if at least one of the following criteria applied: fatal bleeding, symptomatic bleeding in a critical area or organ (intraocular, intracranial, intraspinal or intramuscular with compartment syndrome, retroperitoneal bleeding, intra-articular bleeding, or pericardial bleeding), bleeding causing a fall in hemoglobin level of 2.0 g/dL (1.24 mmol/L or more, or leading to transfusion of 2 or more units of whole blood or red cells).
RE-COVER and RE-COVER II studies compared Pradaxa 150 mg twice daily and warfarin for the treatment of deep vein thrombosis and pulmonary embolism. Patients received 5-10 days of an approved parenteral anticoagulant therapy followed by 6 months, with mean exposure of 164 days, of oral only treatment; warfarin was overlapped with parenteral therapy. Table 3 shows the number of patients experiencing bleeding events in the pooled analysis of RE-COVER and RE-COVER II studies during the full treatment including parenteral and oral only treatment periods after randomization.
Table 3 Bleeding Events in RE-COVER and RE-COVER II Treated Patients |
||||
Note: MBE can belong to more than one criterion. |
||||
|
Bleeding Events-Full Treatment Period |
|||
|
Pradaxa |
Warfarin |
Hazard Ratio |
|
Patients |
N=2553 |
N=2554 |
|
|
Major bleeding eventa |
37 (1.4) |
51 (2.0) |
0.73 (0.48, 1.11) |
|
|
Fatal bleeding |
1 (0.04) |
2 (0.1) |
|
|
Bleeding in a critical area or organ |
7 (0.3) |
15 (0.6) |
|
|
Fall in hemoglobin ≥2 g/dL or transfusion ≥2 units of whole blood or packed red blood cells |
32 (1.3) |
38 (1.5) |
|
Bleeding sites for MBEb |
|
|
|
|
|
Intracranial |
2 (0.1) |
5 (0.2) |
|
|
Retroperitoneal |
2 (0.1) |
1 (0.04) |
|
|
Intraarticular |
2 (0.1) |
4 (0.2) |
|
|
Intramuscular |
2 (0.1) |
6 (0.2) |
|
|
Gastrointestinal |
15 (0.6) |
14 (0.5) |
|
|
Urogenital |
7 (0.3) |
14 (0.5) |
|
|
Other |
8 (0.3) |
8 (0.3) |
|
Clinically relevant non-major bleeding |
101 (4.0) |
170 (6.7) |
0.58 (0.46, 0.75) |
|
Any bleeding |
411 (16.1) |
567 (22.7) |
0.70 (0.61, 0.79) |
The rate of any gastrointestinal bleeds in patients receiving Pradaxa 150 mg in the full treatment period was 3.1% (2.4% on warfarin).
The RE-MEDY and RE-SONATE studies provided safety information on the use of Pradaxa for the reduction in the risk of recurrence of deep vein thrombosis and pulmonary embolism.
RE-MEDY was an active-controlled study (warfarin) in which 1430 patients received Pradaxa 150 mg twice daily following 3 to 12 months of oral anticoagulant regimen. Patients in the treatment studies who rolled over into the RE-MEDY study had a combined treatment duration of up to more than 3 years, with mean exposure of 473 days. Table 4 shows the number of patients experiencing bleeding events in the study.
Table 4 Bleeding Events in RE-MEDY Treated Patients |
||||
Note:
MBE can belong to more than one criterion. |
||||
|
Pradaxa |
Warfarin |
Hazard Ratio |
|
Patients |
N=1430 |
N=1426 |
|
|
Major bleeding eventa |
13 (0.9) |
25 (1.8) |
0.54 (0.25, 1.16) |
|
|
Fatal bleeding |
0 |
1 (0.1) |
|
|
Bleeding in a critical area or organ |
7 (0.5) |
11 (0.8) |
|
|
Fall in hemoglobin ≥2 g/dL or transfusion ≥2 units of whole blood or packed red blood cells |
7 (0.5) |
16 (1.1) |
|
Bleeding sites for MBEb |
|
|
|
|
|
Intracranial |
2 (0.1) |
4 (0.3) |
|
|
Intraocular |
4 (0.3) |
2 (0.1) |
|
|
Retroperitoneal |
0 |
1 (0.1) |
|
|
Intraarticular |
0 |
2 (0.1) |
|
|
Intramuscular |
0 |
4 (0.3) |
|
|
Gastrointestinal |
4 (0.3) |
8 (0.6) |
|
|
Urogenital |
1 (0.1) |
1 (0.1) |
|
|
Other |
2 (0.1) |
4 (0.3) |
|
Clinically relevant non-major bleeding |
71 (5.0) |
125 (8.8) |
0.56 (0.42, 0.75) |
|
Any bleeding |
278 (19.4) |
373 (26.2) |
0.71 (0.61, 0.83) |
In the RE-MEDY study, the rate of any gastrointestinal bleeds in patients receiving Pradaxa 150 mg was 3.1% (2.2% on warfarin).
RE-SONATE was a placebo-controlled study in which 684 patients received Pradaxa 150 mg twice daily following 6 to 18 months of oral anticoagulant regimen. Patients in the treatment studies who rolled over into the RE-SONATE study had combined treatment duration up to 9 months, with mean exposure of 165 days. Table 5 shows the number of patients experiencing bleeding events in the study.
Table 5 Bleeding Events in RE-SONATE Treated Patients |
||||
Note:
MBE can belong to more than one criterion. |
||||
|
Pradaxa |
Placebo |
Hazard Ratio |
|
Patients |
N=684 |
N=659 |
|
|
Major bleeding eventa |
2 (0.3) |
0 |
|
|
|
Bleeding in a critical area or organ |
0 |
0 |
|
|
Gastrointestinalb |
2 (0.3) |
0 |
|
Clinically relevant non-major bleeding |
34 (5.0) |
13 (2.0) |
2.54 (1.34, 4.82) |
|
Any bleeding |
72 (10.5) |
40 (6.1) |
1.77 (1.20, 2.61) |
In the RE-SONATE study, the rate of any gastrointestinal bleeds in patients receiving Pradaxa 150 mg was 0.7% (0.3% on placebo).
Clinical Myocardial Infarction Events
In the active-controlled VTE studies, a higher rate of clinical myocardial
infarction was reported in patients who received Pradaxa [20 (0.66 per 100
patient-years)] than in those who received warfarin [5 (0.17 per 100
patient-years)]. In the placebo-controlled study, a similar rate of non-fatal
and fatal clinical myocardial infarction was reported in patients who received
Pradaxa [1 (0.32 per 100 patient-years)] and in those who received placebo [1
(0.34 per 100 patient-years)].
Gastrointestinal Adverse Reactions
In the four pivotal studies, patients on Pradaxa 150 mg had a similar incidence
of gastrointestinal adverse reactions (24.7% vs. 22.7% on warfarin). Dyspepsia
(including abdominal pain upper, abdominal pain, abdominal discomfort, and
epigastric discomfort) occurred in patients on Pradaxa in 7.5% vs. 5.5% on
warfarin, and gastritis-like symptoms (including gastritis, GERD, esophagitis,
erosive gastritis and gastric hemorrhage) occurred at 3.0% vs. 1.7%,
respectively.
Hypersensitivity Reactions
In the 4 pivotal studies, drug hypersensitivity (including urticaria, rash, and
pruritus), allergic edema, anaphylactic reaction, and anaphylactic shock were
reported in 0.1% of patients receiving Pradaxa.
Prophylaxis of Deep Vein Thrombosis
and Pulmonary Embolism Following Hip Replacement Surgery
Pradaxa was studied in 5476 patients, randomized and treated in two
double-blind, active-controlled non-inferiority trials (RE-NOVATE and RE-NOVATE
II). The demographic characteristics were similar across the two studies and
between the treatment groups within these studies. Approximately 45.3 % of the
treated patients were male, with a mean age of 63.2 years. The majority of the
patients were white (96.1%), 3.6% were Asian, and 0.3% were black with a mean
CrCl of 92 mL/min.
Bleeding events for the RE-NOVATE and RE-NOVATE II studies were classified as major bleeding events if at least one of the following criteria applied: fatal bleeding, symptomatic bleeding in a critical area or organ (intraocular, intracranial, intraspinal or retroperitoneal bleeding), bleeding causing a fall in hemoglobin level of 2.0 g/dL (1.24 mmol/L) or more, or leading to transfusion of 2 or more units of whole blood or red cells, requiring treatment cessation or leading to re-operation.
The RE-NOVATE study compared Pradaxa 75 mg taken orally 1-4 hours after surgery followed by 150 mg once daily, Pradaxa 110 mg taken orally 1-4 hours after surgery followed by 220 mg once daily and subcutaneous enoxaparin 40 mg once daily initiated the evening before surgery for the prophylaxis of deep vein thrombosis and pulmonary embolism in patients who had undergone hip replacement surgery. The RE-NOVATE II study compared Pradaxa 110 mg taken orally 1-4 hours after surgery followed by 220 mg once daily and subcutaneous enoxaparin 40 mg once daily initiated the evening before surgery for the prophylaxis of deep vein thrombosis and pulmonary embolism in patients who had undergone hip replacement surgery. In the RE-NOVATE and RE-NOVATE II studies, patients received 28-35 days of Pradaxa or enoxaparin with median exposure of 33 days. Tables 6 and 7 show the number of patients experiencing bleeding events in the analysis of RE-NOVATE and RE-NOVATE II.
Table 6 Bleeding Events in RE-NOVATE Treated Patients |
||
|
Pradaxa 220 mg |
Enoxaparin |
Patients |
N=1146 |
N=1154 |
Major bleeding event |
23 (2.0) |
18 (1.6) |
Clinically relevant non-major bleeding |
48 (4.2) |
40 (3.5) |
Any bleeding |
141 (12.3) |
132 (11.4) |
Table 7 Bleeding Events in RE-NOVATE II Treated Patients |
||
|
Pradaxa 220 mg |
Enoxaparin |
Patients |
N=1010 |
N=1003 |
Major bleeding event |
14 (1.4) |
9 (0.9) |
Clinically relevant non-major bleeding |
26 (2.6) |
20 (2.0) |
Any bleeding |
98 (9.7) |
83 (8.3) |
In the two studies, the rate of major gastrointestinal bleeds in patients receiving Pradaxa and enoxaparin was the same (0.1%) and for any gastrointestinal bleeds was 1.4% for Pradaxa 220 mg and 0.9% for enoxaparin.
Gastrointestinal Adverse Reactions
In the two studies, the incidence of gastrointestinal adverse reactions for
patients on Pradaxa 220 mg and enoxaparin was 39.5% and 39.5%, respectively.
Dyspepsia (including abdominal pain upper, abdominal pain, abdominal
discomfort, and epigastric discomfort) occurred in patients on Pradaxa 220 mg
in 4.1% vs. 3.8% on enoxaparin, and gastritis-like symptoms (including
gastritis, GERD, esophagitis, erosive gastritis and gastric hemorrhage)
occurred at 0.6% vs. 1.0%, respectively.
Hypersensitivity Reactions
In the two studies, drug hypersensitivity (such as urticaria, rash, and
pruritus) was reported in 0.3% of patients receiving Pradaxa 220 mg.
Clinical Myocardial Infarction Events
In the two studies, clinical myocardial infarction was reported in 2 (0.1%) of
patients who received Pradaxa 220 mg and 6 (0.3%) of patients who received
enoxaparin.
The following adverse reactions have been identified during post approval use of Pradaxa. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. The following adverse reactions have been identified during post approval use of Pradaxa: angioedema, thrombocytopenia, esophageal ulcer.
The concomitant use of Pradaxa with P-gp inducers (e.g., rifampin) reduces exposure to dabigatran and should generally be avoided [see Clinical Pharmacology (12.3)].
P-gp inhibition and impaired renal function are the major independent factors that result in increased exposure to dabigatran [see Clinical Pharmacology (12.3)]. Concomitant use of P-gp inhibitors in patients with renal impairment is expected to produce increased exposure of dabigatran compared to that seen with either factor alone.
In patients with moderate renal impairment (CrCl 30-50 mL/min), reduce the dose of Pradaxa to 75 mg twice daily when administered concomitantly with the P-gp inhibitors dronedarone or systemic ketoconazole. The use of the P-gp inhibitors verapamil, amiodarone, quinidine, clarithromycin, and ticagrelor does not require a dose adjustment of Pradaxa. These results should not be extrapolated to other P-gp inhibitors [see Warnings and Precautions (5.5), Use in Specific Populations (8.6), and Clinical Pharmacology (12.3)].
The concomitant use of Pradaxa and P-gp inhibitors in patients with severe renal impairment (CrCl 15-30 mL/min) should be avoided [see Warnings and Precautions (5.5), Use in Specific Populations (8.6), and Clinical Pharmacology (12.3)].
Avoid use of Pradaxa and P-gp inhibitors in patients with CrCl <50 mL/min [see Warnings and Precautions (5.5), Use in Specific Populations (8.6), and Clinical Pharmacology (12.3)].
In patients with CrCl ≥50 mL/min who have concomitant administration of P-gp inhibitors such as dronedarone or systemic ketoconazole, it may be helpful to separate the timing of administration of dabigatran and the P-gp inhibitor by several hours. The concomitant use of Pradaxa and P-gp inhibitors in patients with CrCl <50 mL/min should be avoided [see Warnings and Precautions (5.5), Use in Specific Populations (8.6) and Clinical Pharmacology (12.2, 12.3)].
Pregnancy Category C
There are no adequate and well-controlled studies in pregnant women.
Dabigatran has been shown to decrease the number of implantations when male and female rats were treated at a dosage of 70 mg/kg (about 2.6 to 3.0 times the human exposure at maximum recommended human dose [MRHD] of 300 mg/day based on area under the curve [AUC] comparisons) prior to mating and up to implantation (gestation Day 6). Treatment of pregnant rats after implantation with dabigatran at the same dose increased the number of dead offspring and caused excess vaginal/uterine bleeding close to parturition. Although dabigatran increased the incidence of delayed or irregular ossification of fetal skull bones and vertebrae in the rat, it did not induce major malformations in rats or rabbits.
Safety and effectiveness of Pradaxa during labor and delivery have not been studied in clinical trials. Consider the risks of bleeding and of stroke in using Pradaxa in this setting [see Warnings and Precautions (5.2)].
Death of offspring and mother rats during labor in association with uterine bleeding occurred during treatment of pregnant rats from implantation (gestation Day 7) to weaning (lactation Day 21) with dabigatran at a dose of 70 mg/kg (about 2.6 times the human exposure at MRHD of 300 mg/day based on AUC comparisons).
It is not known whether dabigatran is excreted in human milk. Because many drugs are excreted in human milk and because of the potential for serious adverse reactions in nursing infants from Pradaxa, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.
Safety and effectiveness of Pradaxa in pediatric patients have not been established.
Of the total number of patients in the RE-LY study, 82% were 65 and over, while 40% were 75 and over. The risk of stroke and bleeding increases with age, but the risk-benefit profile is favorable in all age groups [see Warnings and Precautions (5), Adverse Reactions (6.1), and Clinical Studies (14.1)].
Reduction of Risk of Stroke and Systemic Embolism in Non-valvular Atrial Fibrillation
No dose adjustment of Pradaxa is recommended in patients with mild or moderate renal impairment [see Clinical Pharmacology (12.3)]. Reduce the dose of Pradaxa in patients with severe renal impairment (CrCl 15-30 mL/min) [see Dosage and Administration (2.1, 2.2) and Clinical Pharmacology (12.3)]. Dosing recommendations for patients with CrCl <15 mL/min or on dialysis cannot be provided.
Adjust dose appropriately in patients with renal impairment receiving concomitant P-gp inhibitors [see Warnings and Precautions (5.5), Drug Interactions (7.1), and Clinical Pharmacology (12.3)].
Treatment and Reduction in the Risk of Recurrence of Deep Venous Thrombosis and Pulmonary Embolism
Patients with severe renal impairment (CrCl ≤30 mL/min) were excluded from RE-COVER.
Dosing recommendations for patients with CrCl ≤30 mL/min or on dialysis cannot be provided. Avoid use of Pradaxa with concomitant P-gp inhibitors in patients with CrCl <50 mL/min [see Warnings and Precautions (5.5), Drug Interactions (7.2), and Clinical Pharmacology (12.3)].
Prophylaxis of Deep Vein Thrombosis and Pulmonary Embolism
Following Hip Replacement Surgery
Patients with severe renal impairment (CrCl <30 mL/min) were excluded from
RE-NOVATE and RE-NOVATE II.
Dosing recommendations for patients with CrCl <30 mL/min or on dialysis cannot be provided.
Avoid use of Pradaxa with concomitant P-gp inhibitors in patients with CrCl <50 mL/min [see Warnings and Precautions (5.5), Drug Interactions (7.3) and Clinical Pharmacology (12.2, 12.3)].
Accidental overdose may lead to hemorrhagic complications. In the event of hemorrhagic complications, initiate appropriate clinical support, discontinue treatment with Pradaxa, and investigate the source of bleeding. A specific reversal agent (idarucizumab) is available.
Dabigatran is primarily eliminated by the kidneys with a low plasma protein binding of approximately 35%. Hemodialysis can remove dabigatran; however, data supporting this approach are limited. Using a high-flux dialyzer, blood flow rate of 200 mL/min, and dialysate flow rate of 700 mL/min, approximately 49% of total dabigatran can be cleared from plasma over 4 hours. At the same dialysate flow rate, approximately 57% can be cleared using a dialyzer blood flow rate of 300 mL/min, with no appreciable increase in clearance observed at higher blood flow rates. Upon cessation of hemodialysis, a redistribution effect of approximately 7% to 15% is seen. The effect of dialysis on dabigatran’s plasma concentration would be expected to vary based on patient specific characteristics. Measurement of aPTT or ECT may help guide therapy [see Warnings and Precautions (5.2) and Clinical Pharmacology (12.2)].
The chemical name for dabigatran etexilate mesylate, a direct thrombin inhibitor, is β-Alanine, N-[[2-[[[4-[[[(hexyloxy)carbonyl]amino]iminomethyl]phenyl]amino]methyl]-1-methyl-1H-benzimidazol-5-yl]carbonyl]-N-2-pyridinyl-,ethyl ester, methanesulfonate. The empirical formula is C34H41N7O5 ⋅ CH4O3S and the molecular weight is 723.86 (mesylate salt), 627.75 (free base). The structural formula is:
Dabigatran etexilate mesylate is a yellow-white to yellow powder. A saturated solution in pure water has a solubility of 1.8 mg/mL. It is freely soluble in methanol, slightly soluble in ethanol, and sparingly soluble in isopropanol.
Pradaxa capsules are supplied in 75, 110, and 150 mg strengths for oral administration. Each capsule contains dabigatran etexilate mesylate as the active ingredient: 172.95 mg dabigatran etexilate mesylate (equivalent to 150 mg dabigatran etexilate), 126.83 mg dabigatran etexilate mesylate (equivalent to 110 mg dabigatran etexilate), or 86.48 mg dabigatran etexilate mesylate (equivalent to 75 mg dabigatran etexilate) along with the following inactive ingredients: acacia, dimethicone, hypromellose, hydroxypropyl cellulose, talc, and tartaric acid. The capsule shell is composed of carrageenan, hypromellose, potassium chloride, titanium dioxide, black edible ink, and FD&C Blue No. 2 (150 mg and 110 mg capsules only).
Dabigatran and its acyl glucuronides are competitive, direct thrombin inhibitors. Because thrombin (serine protease) enables the conversion of fibrinogen into fibrin during the coagulation cascade, its inhibition prevents the development of a thrombus. Both free and clot-bound thrombin, and thrombin-induced platelet aggregation are inhibited by the active moieties.
At recommended therapeutic doses, dabigatran etexilate prolongs the coagulation markers such as aPTT, ECT, and TT. INR is relatively insensitive to the exposure to dabigatran and cannot be interpreted the same way as used for warfarin monitoring.
The aPTT test provides an approximation of Pradaxa’s anticoagulant effect. The average time course for effects on aPTT, following approved dosing regimens in patients with various degrees of renal impairment is shown in Figure 2. The curves represent mean levels without confidence intervals; variations should be expected when measuring aPTT. While advice cannot be provided on the level of recovery of aPTT needed in any particular clinical setting, the curves can be used to estimate the time to get to a particular level of recovery, even when the time since the last dose of Pradaxa is not precisely known. In the RE-LY trial, the median (10th to 90th percentile) trough aPTT in patients receiving the 150 mg dose was 52 (40 to 76) seconds.
Figure 2 Average Time Course for Effects of Dabigatran on aPTT, Following Approved Pradaxa Dosing Regimens in Patients with Various Degrees of Renal Impairment*
*Simulations based on PK data from a study in subjects with renal impairment and PK/aPTT relationships derived from the RE-LY study; aPTT prolongation in RE-LY was measured centrally in citrate plasma using PTT Reagent Roche Diagnostics GmbH,Mannheim,Germany. There may be quantitative differences between various established methods for aPTT assessment.
The degree of anticoagulant activity can also be assessed by the ecarin clotting time (ECT). This test is a more specific measure of the effect of dabigatran than activated partial thromboplastin time (aPTT). In the RE-LY trial, the median (10th to 90th percentile) trough ECT in patients receiving the 150 mg dose was 63 (44 to 103) seconds.
In orthopedic hip surgery patients, maximum aPTT response (Emax) to dabigatran and baseline aPTT were higher shortly after surgery than at later time points (e.g. ≥3 days after surgery).
Cardiac Electrophysiology
No prolongation of the QTc interval was observed with dabigatran etexilate at doses up to 600 mg.
Dabigatran etexilate mesylate is absorbed as the dabigatran etexilate ester. The ester is then hydrolyzed, forming dabigatran, the active moiety. Dabigatran is metabolized to four different acyl glucuronides and both the glucuronides and dabigatran have similar pharmacological activity. Pharmacokinetics described here refer to the sum of dabigatran and its glucuronides. Dabigatran displays dose-proportional pharmacokinetics in healthy subjects and patients in the range of doses from 10 to 400 mg.
Absorption
The absolute bioavailability of dabigatran following oral administration of dabigatran etexilate is approximately 3 to 7%. Dabigatran etexilate is a substrate of the efflux transporter P-gp. After oral administration of dabigatran etexilate in healthy volunteers, Cmax occurs at 1 hour post-administration in the fasted state. Coadministration of Pradaxa with a high-fat meal delays the time to Cmax by approximately 2 hours but has no effect on the bioavailability of dabigatran; Pradaxa may be administered with or without food.
The oral bioavailability of dabigatran etexilate increases by 75% when the pellets are taken without the capsule shell compared to the intact capsule formulation. Pradaxa capsules should therefore not be broken, chewed, or opened before administration.
Distribution
Dabigatran is approximately 35% bound to human plasma proteins. The red blood cell to plasma partitioning of dabigatran measured as total radioactivity is less than 0.3. The volume of distribution of dabigatran is 50 to 70 L. Dabigatran pharmacokinetics are dose proportional after single doses of 10 to 400 mg. Given twice daily, dabigatran’s accumulation factor is approximately two.
Elimination
Dabigatran is eliminated primarily in the urine. Renal clearance of dabigatran is 80% of total clearance after intravenous administration. After oral administration of radiolabeled dabigatran, 7% of radioactivity is recovered in urine and 86% in feces. The half-life of dabigatran in healthy subjects is 12 to 17 hours.
After oral administration, dabigatran etexilate is converted to dabigatran. The cleavage of the dabigatran etexilate by esterase-catalyzed hydrolysis to the active principal dabigatran is the predominant metabolic reaction. Dabigatran is not a substrate, inhibitor, or inducer of CYP450 enzymes. Dabigatran is subject to conjugation forming pharmacologically active acyl glucuronides. Four positional isomers, 1-O, 2-O, 3-O, and 4-O-acylglucuronide exist, and each accounts for less than 10% of total dabigatran in plasma.
Renal Impairment
An open, parallel-group single-center study compared dabigatran pharmacokinetics in healthy subjects and patients with mild to moderate renal impairment receiving a single dose of Pradaxa 150 mg. Exposure to dabigatran increases with severity of renal function impairment (Table 8). Similar findings were observed in the RE-LY, RE-COVER and RE-NOVATE II trials.
Table 8 Impact of Renal Impairment on Dabigatran Pharmacokinetics |
||||
+Patients with severe renal impairment were not studied in RE-LY, RE-COVER and RE-NOVATE II. Dosing recommendations in subjects with severe renal impairment are based on pharmacokinetic modeling [see Dosage and Administration (2.1, 2.2) and Use in Specific Populations (8.6)]. |
||||
Renal Function |
CrCl (mL/min) |
Increase in AUC |
Increase in Cmax |
t1/2 |
Normal |
≥ 80 |
1x |
1x |
13 |
Mild |
50-80 |
1.5x |
1.1x |
15 |
Moderate |
30-50 |
3.2x |
1.7x |
18 |
Severe+ |
15-30 |
6.3x |
2.1x |
27 |
Hepatic Impairment
Administration of Pradaxa in patients with moderate hepatic impairment (Child-Pugh B) showed a large inter-subject variability, but no evidence of a consistent change in exposure or pharmacodynamics.
Drug Interactions
A summary of the effect of coadministered drugs on dabigatran exposure is shown in Figures 3.1 and 3.2.
In the orthopedic hip surgery patients, limited clinical data with P-gp inhibitors is available.
Figure 3.1 Effect of P-gp Inhibitor or Inducer (rifampicin) Drugs on Peak and Total Exposure to Dabigatran (Cmax and AUC). Shown are the Geometric Mean Ratios (Ratio) and 90% Confidence Interval (90% CI). The Perpetrator and Dabigatran Etexilate Dose and Dosing Frequency are given as well as the Time of Perpetrator Dosing in Relation to Dabigatran Etexilate Dose (Time Difference)
Figure 3.2 Effect of Non-P-gp Inhibitor or Inducer, Other Drugs, on Peak and Total Exposure to Dabigatran (Cmax and AUC). Shown are the Geometric Mean Ratios (Ratio) and 90% Confidence Interval (90% CI). The Perpetrator and Dabigatran Etexilate Dose and Dosing Frequency are given as well as the Time of Perpetrator Dosing in Relation to Dabigatran Etexilate Dose (Time Difference)
In RE-LY, dabigatran plasma samples were also collected. The concomitant use of proton pump inhibitors, H2 antagonists, and digoxin did not appreciably change the trough concentration of dabigatran.
Impact of Dabigatran on Other Drugs
In clinical studies exploring CYP3A4, CYP2C9, P-gp and other pathways,
dabigatran did not meaningfully alter the pharmacokinetics of amiodarone,
atorvastatin, clarithromycin, diclofenac, clopidogrel, digoxin, pantoprazole,
or ranitidine.
Dabigatran was not carcinogenic when administered by oral gavage to mice and rats for up to 2 years. The highest doses tested (200 mg/kg/day) in mice and rats were approximately 3.6 and 6 times, respectively, the human exposure at MRHD of 300 mg/day based on AUC comparisons.
Dabigatran was not mutagenic in in vitro tests, including bacterial reversion tests, mouse lymphoma assay and chromosomal aberration assay in human lymphocytes, and the in vivo micronucleus assay in rats.
In the rat fertility study with oral gavage doses of 15, 70, and 200 mg/kg, males were treated for 29 days prior to mating, during mating up to scheduled termination, and females were treated 15 days prior to mating through gestation Day 6. No adverse effects on male or female fertility were observed at 200 mg/kg or 9 to 12 times the human exposure at MRHD of 300 mg/day based on AUC comparisons. However, the number of implantations decreased in females receiving 70 mg/kg, or 3 times the human exposure at MRHD based on AUC comparisons.
The clinical evidence for the efficacy of Pradaxa was derived from RE-LY (Randomized Evaluation of Long-term Anticoagulant Therapy), a multi-center, multi-national, randomized parallel group trial comparing two blinded doses of Pradaxa (110 mg twice daily and 150 mg twice daily) with open-label warfarin (dosed to target INR of 2 to 3) in patients with non-valvular, persistent, paroxysmal, or permanent atrial fibrillation and one or more of the following additional risk factors:
· Previous stroke, transient ischemic attack (TIA), or systemic embolism
· Left ventricular ejection fraction <40%
· Symptomatic heart failure, ≥ New York Heart Association Class 2
· Age ≥75 years
· Age ≥65 years and one of the following: diabetes mellitus, coronary artery disease (CAD), or hypertension
The primary objective of this study was to determine if Pradaxa was non-inferior to warfarin in reducing the occurrence of the composite endpoint, stroke (ischemic and hemorrhagic) and systemic embolism. The study was designed to ensure that Pradaxa preserved more than 50% of warfarin’s effect as established by previous randomized, placebo-controlled trials of warfarin in atrial fibrillation. Statistical superiority was also analyzed.
A total of 18,113 patients were randomized and followed for a median of 2 years. The patients’ mean age was 71.5 years and the mean CHADS2 score was 2.1. The patient population was 64% male, 70% Caucasian, 16% Asian, and 1% black. Twenty percent of patients had a history of a stroke or TIA and 50% were Vitamin K antagonist (VKA) naïve, defined as less than 2 months total lifetime exposure to a VKA. Thirty-two percent of the population had never been exposed to a VKA. Concomitant diseases of patients in this trial included hypertension 79%, diabetes 23%, and CAD 28%. At baseline, 40% of patients were on aspirin and 6% were on clopidogrel. For patients randomized to warfarin, the mean percentage of time in therapeutic range (INR 2 to 3) was 64%.
Relative to warfarin and to Pradaxa 110 mg twice daily, Pradaxa 150 mg twice daily significantly reduced the primary composite endpoint of stroke and systemic embolism (see Table 9 and Figure 4).
Table 9 First Occurrence of Stroke or Systemic Embolism in the RE-LY Study* |
|||
* Randomized ITT |
|||
|
Pradaxa |
Pradaxa |
Warfarin |
Patients randomized |
6076 |
6015 |
6022 |
Patients (%) with events |
135 (2.2%) |
183 (3%) |
203 (3.4%) |
Hazard ratio vs. warfarin (95% CI) |
0.65 (0.52, 0.81) |
0.89 (0.73, 1.09) |
|
P-value for superiority |
0.0001 |
0.27 |
|
Hazard ratio vs. Pradaxa 110 mg (95% CI) |
0.72 (0.58, 0.91) |
|
|
P-value for superiority |
0.005 |
|
|
Figure 4 Kaplan-Meier Curve Estimate of Time to First Stroke or Systemic Embolism
The contributions of the components of the composite endpoint, including stroke by subtype, are shown in Table 10. The treatment effect was primarily a reduction in stroke. Pradaxa 150 mg twice daily was superior in reducing ischemic and hemorrhagic strokes relative to warfarin.
Table 10 Strokes and Systemic Embolism in the RE-LY Study |
|||
|
Pradaxa |
Warfarin |
Hazard ratio
vs. warfarin |
Patients randomized |
6076 |
6022 |
|
Stroke |
123 |
187 |
0.64 (0.51, 0.81) |
Ischemic stroke |
104 |
134 |
0.76 (0.59, 0.98) |
Hemorrhagic stroke |
12 |
45 |
0.26 (0.14, 0.49) |
Systemic embolism |
13 |
21 |
0.61 (0.30, 1.21) |
In the RE-LY trial, the rate of all-cause mortality was lower on dabigatran 150 mg than on warfarin (3.6% per year versus 4.1% per year). The rate of vascular death was lower on dabigatran 150 mg compared to warfarin (2.3% per year versus 2.7% per year). Non-vascular death rates were similar in the treatment arms.
The efficacy of Pradaxa 150 mg twice daily was generally consistent across major subgroups (see Figure 5).
Figure 5 Stroke and Systemic Embolism Hazard Ratios by Baseline Characteristics*
*
Randomized ITT
Note: The figure above presents effects in various subgroups all of which are
baseline characteristics and all of which were pre-specified. The 95%
confidence limits that are shown do not take into account how many comparisons
were made, nor do they reflect the effect of a particular factor after
adjustment for all other factors. Apparent homogeneity or heterogeneity among
groups should not be over-interpreted.
In RE-LY, a higher rate of clinical myocardial infarction was reported in patients who received Pradaxa (0.7 per 100 patient-years for 150 mg dose) than in those who received warfarin (0.6).
In the randomized, parallel group, double-blind trials, RE-COVER and RE-COVER II, patients with deep vein thrombosis and pulmonary embolism received Pradaxa 150 mg twice daily or warfarin (dosed to target INR of 2 to 3) following initial treatment with an approved parenteral anticoagulant for 5-10 days.
In RE-COVER, the median treatment duration during the oral only treatment period was 174 days. A total of 2539 patients (30.9% patients with symptomatic PE with or without DVT and 68.9% with symptomatic DVT only) were treated with a mean age of 54.7 years. The patient population was 58.4% male, 94.8% white, 2.6% Asian, and 2.6% black. The concomitant diseases of patients in this trial included hypertension (35.9%), diabetes mellitus (8.3%), coronary artery disease (6.5%), active cancer (4.8%), and gastric or duodenal ulcer (4.4%). Concomitant medications included agents acting on renin-angiotensin system (25.2%), vasodilators (28.4%), serum lipid-reducing agents (18.2%), NSAIDs (21%), beta-blockers (14.8%), calcium channel blockers (8.5%), ASA (8.6%), and platelet inhibitors excluding ASA (0.6%). Patients randomized to warfarin had a mean percentage of time in the INR target range of 2.0 to 3.0 of 60% in RE-COVER study.
In RE-COVER II, the median treatment duration during the oral only treatment period was 174 days. A total of 2568 patients (31.8% patients with symptomatic PE with or without DVT and 68.1% with symptomatic DVT only) were treated with a mean age of 54.9 years. The patient population was 60.6% male, 77.6% white, 20.9% Asian, and 1.5% black. The concomitant diseases of patients in this trial included hypertension (35.1%), diabetes mellitus (9.8%), coronary artery disease (7.1%), active cancer (3.9%), and gastric or duodenal ulcer (3.8%). Concomitant medications included agents acting on renin-angiotensin system (24.2%), vasodilators (28.6%), serum lipid-reducing agents (20.0%), NSAIDs (22.3%), beta-blockers (14.8%), calcium channel blockers (10.8%), ASA (9.8%), and platelet inhibitors excluding ASA (0.8%). Patients randomized to warfarin had a mean percentage of time in the INR target range of 2.0 to 3.0 of 57% in RE-COVER II study.
In studies RE-COVER and RE-COVER II, the protocol specified non-inferiority margin (2.75) for the hazard ratio was derived based on the upper limit of the 95% confidence interval of the historical warfarin effect. Pradaxa was demonstrated to be non-inferior to warfarin (dosed to target INR of 2 to 3) (Table 11) based on the primary composite endpoint (fatal PE or symptomatic non-fatal PE and/or DVT) and retains at least 66.9% (RE-COVER) and 63.9% (RE-COVER II) of the historical warfarin effect, respectively.
Table 11 Primary Efficacy Endpoint for RE-COVER and RE-COVER II – Modified ITTa Population |
||||
aModified
ITT analyses population consists of all randomized patients who received at
least one dose of study medication. |
||||
|
Pradaxa |
Warfarin |
Hazard ratio vs. |
|
RE-COVER |
N=1274 |
N=1265 |
|
|
Primary Composite Endpointb |
34 (2.7) |
32 (2.5) |
1.05 (0.65, 1.70) |
|
|
Fatal PEc |
1 (0.1) |
3 (0.2) |
|
|
Symptomatic non-fatal PEc |
16 (1.3) |
8 (0.6) |
|
|
Symptomatic recurrent DVTc |
17 (1.3) |
23 (1.8) |
|
RE-COVER II |
N=1279 |
N=1289 |
|
|
Primary Composite Endpointb |
34 (2.7) |
30 (2.3) |
1.13 (0.69, 1.85) |
|
|
Fatal PEc |
3 (0.2) |
0 |
|
|
Symptomatic non-fatal PEc |
9 (0.7) |
15 (1.2) |
|
|
Symptomatic recurrent DVTc |
30 (2.3) |
17 (1.3) |
|
In the randomized, parallel group, double-blind, pivotal trial, RE-MEDY, patients received Pradaxa 150 mg twice daily or warfarin (dosed to target INR of 2 to 3) following 3 to 12 months of treatment with anticoagulation therapy for an acute VTE. The median treatment duration during the treatment period was 534 days. A total of 2856 patients were treated with a mean age of 54.6 years. The patient population was 61% male, and 90.1% white, 7.9% Asian and 2.0% black. The concomitant diseases of patients in this trial included hypertension (38.6%), diabetes mellitus (9.0%), coronary artery disease (7.2%), active cancer (4.2%), and gastric or duodenal ulcer (3.8%). Concomitant medications included agents acting on renin-angiotensin system (27.9%), vasodilators (26.7%), serum lipid reducing agents (20.6%), NSAIDs (18.3%), beta-blockers (16.3%), calcium channel blockers (11.1%), aspirin (7.7%), and platelet inhibitors excluding ASA (0.9%). Patients randomized to warfarin had a mean percentage of time in the INR target range of 2.0 to 3.0 of 62% in the study.
n study RE-MEDY, the protocol specified non-inferiority margin (2.85) for the hazard ratio was derived based on the point estimate of the historical warfarin effect. Pradaxa was demonstrated to be non-inferior to warfarin (dosed to target INR of 2 to 3) (Table 12) based on the primary composite endpoint (fatal PE or symptomatic non-fatal PE and/or DVT) and retains at least 63.0% of the historical warfarin effect. If the non-inferiority margin was derived based on the 50% retention of the upper limit of the 95% confidence interval, Pradaxa was demonstrated to retain at least 33.4% of the historical warfarin effect based on the composite primary endpoint.
Table 12 Primary Efficacy Endpoint for RE-MEDY – Modified ITTa Population |
||||
aModified
ITT analyses population consists of all randomized patients who received at
least one dose of study medication. |
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|
Pradaxa |
Warfarin |
Hazard ratio vs. |
|
Primary Composite Endpointb |
26 (1.8) |
18 (1.3) |
1.44 (0.78, 2.64) |
|
|
Fatal PEc |
1 (0.07) |
1 (0.07) |
|
|
Symptomatic non-fatal PEc |
10 (0.7) |
5 (0.4) |
|
|
Symptomatic recurrent DVTc |
17 (1.2) |
13 (0.9) |
|
In a randomized, parallel group, double-blind, pivotal trial, RE-SONATE, patients received Pradaxa 150 mg twice daily or placebo following 6 to 18 months of treatment with anticoagulation therapy for an acute VTE. The median treatment duration was 182 days. A total of 1343 patients were treated with a mean age of 55.8 years. The patient population was 55.5% male, 89.0% white, 9.3% Asian, and 1.7% black. The concomitant diseases of patients in this trial included hypertension (38.8%), diabetes mellitus (8.0%), coronary artery disease (6.0%), history of cancer (6.0%), gastric or duodenal ulcer (4.5%), and heart failure (4.6%). Concomitant medications included agents acting on renin-angiotensin system (28.7%), vasodilators (19.4%), beta-blockers (18.5%), serum lipid reducing agents (17.9%), NSAIDs (12.1%), calcium channel blockers (8.9%), aspirin (8.3%), and platelet inhibitors excluding ASA (0.7%). Based on the outcome of the primary composite endpoint (fatal PE, unexplained death, or symptomatic non-fatal PE and/or DVT), Pradaxa was superior to placebo (Table 13).
Table 13 Primary Efficacy Endpoint for RE-SONATE – Modified ITTa Population |
||||
aModified
ITT analyses population consists of all randomized patients who received at
least one dose of study medication. |
||||
|
Pradaxa |
Placebo |
Hazard ratio vs. |
|
Primary Composite Endpointb |
3 (0.4) |
37 (5.6) |
0.08 (0.02, 0.25) |
|
|
Fatal PE and unexplained deathc |
0 |
2 (0.3) |
|
|
Symptomatic non-fatal PEc |
1 (0.1) |
14 (2.1) |
|
|
Symptomatic recurrent DVTc |
2 (0.3) |
23 (3.5) |
|
In the randomized, parallel group, double-blind, non-inferiority trials, RE-NOVATE and RE-NOVATE II patients received Pradaxa 75 mg orally 1-4 hours after surgery followed by 150 mg daily (RE-NOVATE), Pradaxa 110 mg orally 1-4 hours after surgery followed by 220 mg daily (RE-NOVATE and RE-NOVATE II) or subcutaneous enoxaparin 40 mg once daily initiated the evening before surgery (RE-NOVATE and RE-NOVATE II) for the prophylaxis of deep vein thrombosis and pulmonary embolism in patients who have undergone hip replacement surgery.
Overall, in RE-NOVATE and RE-NOVATE II, the median treatment duration was 33 days for Pradaxa and 33 days for enoxaparin. A total of 5428 patients were treated with a mean age of 63.2 years. The patient population was 45.3% male, 96.1% white, 3.6% Asian, and 0.4 % black. The concomitant diseases of patients in these trials included hypertension (46.1%), venous insufficiency (15.4%), coronary artery disease (8.2%), diabetes mellitus (7.9%), reduced renal function (5.3%), heart failure (3.4%), gastric or duodenal ulcer (3.0%), VTE (2.7%), and malignancy (0.1%). Concomitant medications included cardiac therapy (69.7%), NSAIDs (68%), vasoprotectives (29.7%), agents acting on renin-angiotensin system (29.1%), beta-blockers (21.5%), diuretics (20.8%), lipid modifying agents (18.2%), any antithrombin/anticoagulant (16.0%), calcium channel blockers (13.6%), low molecular weight heparin (7.8%), aspirin (7.0%), platelet inhibitors excluding ASA (6.9%), other antihypertensives (6.7%), and peripheral vasodilators (2.6%).
For efficacy evaluation all patients were to have bilateral venography of the lower extremities at 3 days after last dose of study drug unless an endpoint event had occurred earlier in the study. In the primary efficacy analysis, Pradaxa 110 mg orally 1-4 hours after surgery followed by 220 mg daily was non-inferior to enoxaparin 40 mg once daily in a composite endpoint of confirmed VTE (proximal or distal DVT on venogram, confirmed symptomatic DVT, or confirmed PE) and all cause death during the treatment period (Tables 14 and 15). In the studies 2628 (76.5%) patients in RE-NOVATE and 1572 (78.9%) patients in RE-NOVATE II had evaluable venograms at study completion.
Table 14 Primary Efficacy Endpoint for RE-NOVATE |
||
aFull
Analysis Set (FAS): The FAS included all randomized patients who received at
least one subcutaneous injection or one oral dose of study medication,
underwent surgery and subjects for whom the presence or absence of an
efficacy outcome at the end of the study was known, i.e., an evaluable
negative venogram for both distal and proximal DVT in both legs or any of the
following: positive venography in one or both legs, or confirmed symptomatic
DVT, PE, or death during the treatment period. |
||
|
Pradaxa |
Enoxaparin |
Number of Patientsa |
N=880 |
N= 897 |
Primary Composite Endpoint |
53 (6.0) |
60 (6.7) |
Risk difference (%) vs. enoxaparin (95% CI) |
-0.7 (-2.9, 1.6) |
|
Number of Patients |
N=909 |
N=917 |
Composite endpoint of major VTEb and VTE related mortality |
28 (3.1) |
36 (3.9) |
Number of Patients |
N=905 |
N=914 |
Proximal DVT |
23 (2.5) |
33 (3.6) |
Number of Patients |
N=874 |
N=894 |
Total DVT |
46 (5.3) |
57 (6.4) |
Number of Patients |
N=1137 |
N=1142 |
Symptomatic DVT |
6 (0.5) |
1 (0.1) |
PE |
5 (0.4) |
3 (0.3) |
Death |
3 (0.3) |
0 |
Table 15 Primary Efficacy Endpoint for RE-NOVATE II |
||
aFull
Analysis Set (FAS): The FAS included all randomized patients who received at
least one subcutaneous injection or one oral dose of study medication,
underwent surgery and subjects for whom the presence or absence of an
efficacy outcome at the end of the study was known, i.e., an evaluable
negative venogram for both distal and proximal DVT in both legs or any of the
following: positive venography in one or both legs, or confirmed symptomatic
DVT, PE, or death during the treatment period. |
||
|
Pradaxa |
Enoxaparin |
Number of Patientsa |
N=792 |
N= 786 |
Primary Composite Endpoint |
61 (7.7) |
69 (8.8) |
Risk difference (%) vs. enoxaparin (95% CI) |
-1.1 (-3.8, 1.6) |
|
Number of Patients |
N=805 |
N=795 |
Composite endpoint of major VTEb and VTE related mortality |
18 (2.2) |
33 (4.2) |
Number of Patients |
N=804 |
N=793 |
Proximal DVT |
17 (2.1) |
31 (3.9) |
Number of Patients |
N=791 |
N=784 |
Total DVT |
60 (7.6) |
67 (8.5) |
Number of Patients |
N=1001 |
N=992 |
Symptomatic DVT |
0 |
4 (0.4) |
PE |
1 (0.1) |
2 (0.2) |
Death |
0 |
1 (0.1) |
Pradaxa 75 mg capsules have a white opaque cap imprinted with the Boehringer Ingelheim company symbol and a white opaque body imprinted with “R75”. The color of the imprinting is black. The capsules are supplied in the packages listed:
· NDC 0597-0355-09 Unit of use bottle of 60 capsules
· NDC 0597-0355-56 Blister package containing 60 capsules (10 x 6 capsule blister cards)
Pradaxa 110 mg capsules have a light blue opaque cap imprinted with the Boehringer Ingelheim company symbol and a light blue opaque body imprinted with “R110”. The color of the imprinting is black. The capsules are supplied in the packages listed:
· NDC 0597-0108-54 Unit of use bottle of 60 capsules
· NDC 0597-0108-60 Blister package containing 60 capsules (10 x 6 capsule blister cards)
Pradaxa 150 mg capsules have a light blue opaque cap imprinted with the Boehringer Ingelheim company symbol and a white opaque body imprinted with “R150”. The color of the imprinting is black. The capsules are supplied in the packages listed:
· NDC 0597-0360-55 Unit of use bottle of 60 capsules
· NDC 0597-0360-82 Blister package containing 60 capsules (10 x 6 capsule blister cards)
Bottles
Store at 25°C (77°F); excursions permitted to 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. Once opened, the product must be used within 4 months. Keep the bottle tightly closed. Store in the original package to protect from moisture.
Blisters
Store at 25°C (77°F); excursions permitted to 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. Store in the original package to protect from moisture.
Keep out of the reach of children.
Advise the patient to read the FDA-approved patient labeling (Medication Guide).
· Tell patients to take Pradaxa exactly as prescribed.
· Remind patients not to discontinue Pradaxa without talking to the health care provider who prescribed it.
· Keep Pradaxa in the original bottle to protect from moisture. Do not put Pradaxa in pill boxes or pill organizers.
· When more than one bottle is dispensed to the patient, instruct them to open only one bottle at a time.
· Instruct patient to remove only one capsule from the opened bottle at the time of use. The bottle should be immediately and tightly closed.
· Advise patients not to chew or break the capsules before swallowing them and not to open the capsules and take the pellets alone.
· Advise patients that the capsule should be taken with a full glass of water.
Inform patients that they may bleed more easily, may bleed longer, and should call their health care provider for any signs or symptoms of bleeding.
Instruct patients to seek emergency care right away if they have any of the following, which may be a sign or symptom of serious bleeding:
· Unusual bruising (bruises that appear without known cause or that get bigger)
· Pink or brown urine
· Red or black, tarry stools
· Coughing up blood
· Vomiting blood, or vomit that looks like coffee grounds
Instruct patients to call their health care provider or to get prompt medical attention if they experience any signs or symptoms of bleeding:
· Pain, swelling or discomfort in a joint
· Headaches, dizziness, or weakness
· Reoccurring nose bleeds
· Unusual bleeding from gums
· Bleeding from a cut that takes a long time to stop
· Menstrual bleeding or vaginal bleeding that is heavier than normal
If patients have had neuraxial anesthesia or spinal puncture, and particularly, if they are taking concomitant NSAIDs or platelet inhibitors, advise patients to watch for signs and symptoms of spinal or epidural hematoma, such as back pain, tingling, numbness (especially in the lower limbs), muscle weakness, and stool or urine incontinence. If any of these symptoms occur, advise the patient to contact his or her physician immediately [see Boxed Warning].
Instruct patients to call their health care provider if they experience any signs or symptoms of dyspepsia or gastritis:
· Dyspepsia (upset stomach), burning, or nausea
· Abdominal pain or discomfort
· Epigastric discomfort, GERD (gastric indigestion)
Instruct patients to inform their health care provider that they are taking Pradaxa before any invasive procedure (including dental procedures) is scheduled.
Ask patients to list all prescription medications, over-the-counter medications, or dietary supplements they are taking or plan to take so their health care provider knows about other treatments that may affect bleeding risk (e.g., aspirin or NSAIDs) or dabigatran exposure (e.g., dronedarone or systemic ketoconazole).
Instruct patients to inform their health care provider if they will have or have had surgery to place a prosthetic heart valve.
Distributed
by:
Boehringer Ingelheim Pharmaceuticals, Inc.
Ridgefield,CT06877USA
Copyright
2017 Boehringer Ingelheim Pharmaceuticals, Inc.
ALL RIGHTS RESERVED
IT5060AIG262017
MEDICATION GUIDE |
||
Read this Medication Guide before you start taking Pradaxa and each time you get a refill. There may be new information. This Medication Guide does not take the place of talking with your doctor about your medical condition or your treatment. |
||
What is the most important information I should know about Pradaxa?
· For
people taking Pradaxa for atrial fibrillation: · Pradaxa can cause bleeding which can be serious, and sometimes lead to death. This is because Pradaxa is a blood thinner medicine that lowers the chance of blood clots forming in your body. · You may have a higher risk of bleeding if you take Pradaxa and: o are over 75 years old o have kidney problems o have stomach or intestine bleeding that is recent or keeps coming back, or you have a stomach ulcer o take other medicines that increase your risk of bleeding, including: o aspirin or aspirin containing products o long-term (chronic) use of non-steroidal anti-inflammatory drugs (NSAIDs) o warfarin sodium (Coumadin®, Jantoven®) o a medicine that contains heparin o clopidogrel bisulfate (Plavix®) o prasugrel (Effient®)
have
certain kidney problems and also take the medicines dronedarone (Multaq®) or ketoconazole tablets (Nizoral®). Pradaxa can increase your risk of bleeding because it lessens the ability of your blood to clot. While you take Pradaxa: you may bruise more easily it may take longer for any bleeding to stop Call your doctor or get medical help right away if you have any of these signs or symptoms of bleeding: unexpected bleeding or bleeding that lasts a long time, such as: o unusual bleeding from the gums o nose bleeds that happen often o menstrual bleeding or vaginal bleeding that is heavier than normal bleeding that is severe or you cannot control pink or brown urine red or black stools (looks like tar) bruises that happen without a known cause or get larger cough up blood or blood clots vomit blood or your vomit looks like “coffee grounds” unexpected pain, swelling, or joint pain headaches, feeling dizzy or weak
Take
Pradaxa exactly as prescribed. Do not stop taking Pradaxa without first
talking to the doctor who prescribes it for you. Stopping Pradaxa may
increase your risk of a stroke. Spinal or epidural blood clots (hematoma). People who take a blood thinner medicine (anticoagulant) like Pradaxa, and have medicine injected into their spinal and epidural area, or have a spinal puncture have a risk of forming a blood clot that can cause long-term or permanent loss of the ability to move (paralysis). Your risk of developing a spinal or epidural blood clot is higher if: a thin tube called an epidural catheter is placed in your back to give you certain medicine. you take NSAIDs or a medicine to prevent blood from clotting you have a history of difficult or repeated epidural or spinal punctures you have a history of problems with your spine or have had surgery on your spine. If you take Pradaxa and receive spinal anesthesia or have a spinal puncture, your doctor should watch you closely for symptoms of spinal or epidural blood clots. Tell your doctor right away if you have back pain, tingling, numbness, muscle weakness (especially in your legs and feet), loss of control of the bowels or bladder (incontinence). See “What are the possible side effects of Pradaxa?” for more information about side effects. |
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What is Pradaxa? · reduce the risk of stroke and blood clots in people who have a medical condition called atrial fibrillation. With atrial fibrillation, part of the heart does not beat the way it should. This can lead to blood clots forming and increase your risk of a stroke. · treat blood clots in the veins of your legs (deep vein thrombosis) or lungs (pulmonary embolism) and reduce the risk of them occurring again. · to help prevent blood clots in the legs and lungs of people who have just had hip replacement surgery.
Pradaxa is not
for use in people with artificial (prosthetic) heart valves. |
||
Who should not take Pradaxa? Do not take Pradaxa if you: · currently have certain types of abnormal bleeding. Talk to your doctor before taking Pradaxa if you currently have unusual bleeding. · have had a serious allergic reaction to Pradaxa. Ask your doctor if you are not sure. · have ever had or plan to have a valve in your heart replaced |
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What should I tell my doctor before taking Pradaxa? Before you take Pradaxa, tell your doctor if you: · have kidney problems · have ever had bleeding problems · have ever had stomach ulcers · have any other medical condition · are pregnant or plan to become pregnant. It is not known if Pradaxa will harm your unborn baby. · are breastfeeding or plan to breastfeed. It is not known if Pradaxa passes into your breast milk.
Tell all of your doctors and dentists that you are taking Pradaxa.
They should talk to the doctor who prescribed Pradaxa for you, before you
have any surgery,
or a medical or dental procedure. · rifampin (Rifater®, Rifamate®, Rimactane®, Rifadin®)
|
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How should I take Pradaxa? · Your doctor will decide how long you should take Pradaxa. Do not stop taking Pradaxa without first talking with your doctor. Stopping Pradaxa may increase your risk of having a stroke or forming blood clots. · Take Pradaxa exactly as prescribed by your doctor. · Take Pradaxa capsules twice a day (approximately every 12 hours). · If you miss a dose of Pradaxa, take it as soon as you remember. If your next dose is less than 6 hours away, skip the missed dose. Do not take two doses of Pradaxa at the same time. · Swallow Pradaxa capsules whole. Do not break, chew, or empty the pellets from the capsule. · You can take Pradaxa with or without food. · You should take Pradaxa with a full glass of water. · Do not run out of Pradaxa. Refill your prescription before you run out. If you plan to have surgery, or a medical or a dental procedure, tell your doctor and dentist that you are taking Pradaxa. You may have to stop taking Pradaxa for a short time. See “What is the most important information I should know about Pradaxa?”. · If you take too much Pradaxa, go to the nearest hospital emergency room or call your doctor. · Call your doctor or healthcare provider right away if you fall or injure yourself, especially if you hit your head. Your doctor or healthcare provider may need to check you. · Pradaxa comes in a bottle or in a blister package. · Only open 1 bottle of Pradaxa at a time. Finish your opened bottle of Pradaxa before opening a new bottle. · After opening a bottle of Pradaxa, use within 4 months. See “How should I store Pradaxa?” · When it is time for you to take a dose of Pradaxa, only remove your prescribed dose of Pradaxa from your open bottle or blister package. · Tightly close your bottle of Pradaxa right away after you take your dose. |
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What are the possible side effects of Pradaxa? Pradaxa can cause serious side effects, including: · See “What is the most important information I should know about Pradaxa?” · Allergic Reactions. In some people, Pradaxa can cause symptoms of an allergic reaction, including hives, rash, and itching. Tell your doctor or get medical help right away if you get any of the following symptoms of a serious allergic reaction with Pradaxa: |
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o chest pain or chest tightness o swelling of your face or tongue |
o trouble breathing or wheezing o feeling dizzy or faint |
|
Common side effects of Pradaxa include: · indigestion, upset stomach, or burning · stomach pain
Tell your doctor
if you have any side effect that bothers you or that does not go away. |
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How should I store Pradaxa? · Store Pradaxa at room temperature 68°F to 77°F (20°C to 25°C). After opening the bottle, use Pradaxa within 4 months. Safely throw away any unused Pradaxa after 4 months. · Keep Pradaxa in the original bottle or blister package to keep it dry (protect the capsules from moisture). Do not put Pradaxa in pill boxes or pill organizers. · Tightly close your bottle of Pradaxa right away after you take your dose. Keep Pradaxa and all medicines out of the reach of children. |
||
General information about the safe and effective
use of Pradaxa |
||
What are the ingredients in Pradaxa? |
This Medication Guide has been approved by the U.S. Food and Drug Administration. Revised: July 2017
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Labeler - Boehringer Ingelheim Pharmaceuticals Inc. (603175944) |
Registrant - Boehringer Ingelheim Pharmaceuticals Inc. (603175944) |
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Establishment |
|||
Name |
Address |
ID/FEI |
Operations |
West-Ward Columbus Inc. |
|
058839929 |
LABEL(0597-0149, 0597-0108, 0597-0360, 0597-0355, 0597-0135), PACK(0597-0360, 0597-0149, 0597-0108, 0597-0355, 0597-0135) |
Establishment |
|||
Name |
Address |
ID/FEI |
Operations |
Boehringer Ingelheim Pharma GmbH & Co. KG |
|
551147440 |
ANALYSIS(0597-0149, 0597-0360, 0597-0355, 0597-0108, 0597-0135), API MANUFACTURE(0597-0108, 0597-0360, 0597-0135, 0597-0355, 0597-0149), LABEL(0597-0149, 0597-0108, 0597-0360, 0597-0355, 0597-0135), MANUFACTURE(0597-0149, 0597-0355, 0597-0360, 0597-0108, 0597-0135), PACK(0597-0360, 0597-0149, 0597-0108, 0597-0355, 0597-0135) |
Establishment |
|||
Name |
Address |
ID/FEI |
Operations |
Bidachem S.p.a. |
|
429232812 |
API MANUFACTURE(0597-0108, 0597-0360, 0597-0355, 0597-0135, 0597-0149), ANALYSIS(0597-0149, 0597-0360, 0597-0355, 0597-0135, 0597-0108) |
Establishment |
|||
Name |
Address |
ID/FEI |
Operations |
Boehringer Ingelheim Pharma GmbH and Co. KG |
|
340700520 |
LABEL(0597-0149, 0597-0108, 0597-0360, 0597-0355, 0597-0135), PACK(0597-0360, 0597-0149, 0597-0108, 0597-0355, 0597-0135) |
Establishment |
|||
Name |
Address |
ID/FEI |
Operations |
Gfm Gesellschaft Fuer Micronisierung Mbh |
|
328866827 |
API MANUFACTURE(0597-0108, 0597-0360, 0597-0135, 0597-0355, 0597-0149) |
Establishment |
|||
Name |
Address |
ID/FEI |
Operations |
Micro-Macinazione SA |
|
480918515 |
API MANUFACTURE(0597-0108, 0597-0360, 0597-0135, 0597-0355, 0597-0149) |
Revised: 08/2017
Boehringer Ingelheim Pharmaceuticals Inc.