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Warfarin – a coumarin – with brand name, Coumadin, is a prescription drug used as an anticoagulant to inhibit formation of blood clots, and so is a therapy for deep vein thrombosis and pulmonary embolism. [9] [10] [11] It may be used to prevent recurrent blood clot formation from atrial fibrillation, thrombotic stroke, and transient ...
Warfarin is indicated for the prophylaxis and treatment of venous thrombosis and its extension, pulmonary embolism; [9] prophylaxis and treatment of thromboembolic complications associated with atrial fibrillation and/or cardiac valve replacement; [9] and reduction in the risk of death, recurrent myocardial infarction, and thromboembolic events such as stroke or systemic embolization after ...
An antithrombotic agent is a drug that reduces the formation of blood clots (). [1] [2] Antithrombotics can be used therapeutically for prevention (primary prevention, secondary prevention) or treatment of a dangerous blood clot (acute thrombus).
Average molecular weight: heparin is about 15 kDa, and LMWH is about 4.5 kDa. [25] Less frequent subcutaneous dosing than for heparin for postoperative prophylaxis of venous thromboembolism. Once or twice daily subcutaneous injection for treatment of venous thromboembolism and in unstable angina instead of intravenous infusion of high-dose heparin.
The use of LMWH has allowed once-daily dosing, thus not requiring a continuous infusion of the drug. If long-term anticoagulation is required, heparin is often used only to commence anticoagulation therapy until an oral anticoagulant e.g. warfarin takes effect. The American College of Chest Physicians publishes clinical guidelines on heparin ...
It is administered intravenously (into a vein) or subcutaneously (below the skin). Heparin can exert an immediate anti-clotting effect which is useful for the treatment of acute symptoms. [36] Besides, heparin therapy is indicated for anticoagulation during pregnancy as it does not cross the placenta and is not associated with fetal malformations.
Warfarin and vitamin K antagonists are anticoagulants that can be taken orally to reduce thromboembolic occurrence. Where a more effective response is required, heparin can be given (by injection) concomitantly. As a side effect of any anticoagulant, the risk of bleeding is increased, so the international normalized ratio of blood is monitored ...
These people should be given therapeutic doses of LMWH medication, either by switching from another anticoagulant or by taking a higher dose of LMWH. [46] In pregnancy, warfarin and DOACs are not considered suitable and LMWH is recommended. [42] For those with a small pulmonary embolism and few risk factors, no anticoagulation is needed. [42]