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  • Title: Hemorrhagic complications associated with dabigatran use.
    Author: Chen BC, Viny AD, Garlich FM, Basciano P, Howland MA, Smith SW, Hoffman RS, Nelson LS.
    Journal: Clin Toxicol (Phila); 2012 Nov; 50(9):854-7. PubMed ID: 22970730.
    Abstract:
    OBJECTIVE: Dabigatran is a direct thrombin inhibitor approved for anticoagulation in non-valvular atrial fibrillation and, in some countries, for thromboembolism prophylaxis following select orthopedic surgeries. Despite decreased rates of thromboembolism, bleeding remains a risk due to the inability to conveniently monitor anticoagulant effect and the lack of a reversal agent. CASE SERIES: We present four cases of dabigatran-related bleeding. A 79-year-old man on aspirin, clopidogrel, and dabigatran presented with rectal bleeding and epistaxis. He died despite transfusion and administration of prothrombin complex concentrate. A 73-year-old woman on dabigatran and aspirin survived after transfusion and an emergent sternotomy for cardiac tamponade. An 86 year-old man with kidney disease and thrombocytopenia received packed red blood cells, platelets, and fresh frozen plasma for rectal bleeding while on dabigatran. An 80 year-old man on dabigatran had a subdural hematoma after falling and hitting his head. Serial imaging showed no progression. CONCLUSION: The absence of a reversal agent for dabigatran raises concern for uncontrollable bleeding and death. Dabigatran's listed contraindications include active bleeding and a history of dabigatran hypersensitivity reaction. Wider use may result in bleeding rates higher than anticipated from clinical trials. Risks factors that may have contributed to bleeding in these patients include concomitant bleeding diathesis, antiplatelet agent use, renal insufficiency, advanced age, and fall risks.
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