Current Options in the Prevention of Thromboembolic Disease
Tóm tắt
Significant advances in the pharmacological prophylaxis of venous thromboembolism have occurred since warfarin and unfractionated heparin were introduced for this indication nearly 60 years ago. Despite these advances, coumarin derivatives such as warfarin remain the only orally active anticoagulants available for prophylaxis in venous thromboembolism. Although administered orally, coumarin derivatives are not convenient to use, because they have narrow therapeutic indexes and require routine coagulation monitoring and dose adjustment. This is inconvenient for patients and physicians and costly for the healthcare system. Low-molecular-weight heparins, which are administered in fixed or weight-adjusted doses and do not require monitoring, are widely used for the prevention of venous thromboembolism in patients in both the hospital and the outpatient setting. However, these drugs must be given subcutaneously, which can be difficult for outpatients and resource-intensive for in-hospital use. Likewise, fondaparinux, the synthetic pentasaccharide, must be administered subcutaneously. Consequently, there remains a need for new orally active anticoagulants that can be given in fixed doses and do not have a narrow therapeutic index, so that coagulation monitoring is unnecessary. Because such agents would be more convenient for patients and physicians, they would probably expand the use of prophylaxis in venous thromboembolism in those at risk, and would simplify treatment of patients with established venous thromboembolism.
Tài liệu tham khảo
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