In this multicenter trial, the oral factor Xa inhibitor apixaban was compared with enoxaparin and warfarin for the treatment of acute venous thromboembolism. Apixaban was noninferior to enoxaparin and warfarin with respect to efficacy and superior with respect to safety. Venous thromboembolism, with an annual incidence of 1 to 2 cases per 1000 persons in the general population, is the third most common cause of vascular death after myocardial infarction and stroke. 1 Conventional treatment consists of a parenteral anticoagulant, such as enoxaparin, for at least 5 days, and warfarin begun during this time and continued for at least 3 months. 2 Although effective, this regimen presents a challenge because enoxaparin requires daily subcutaneous injections, and warfarin therapy requires coagulation monitoring and dose adjustment. Apixaban is an oral factor Xa inhibitor with a rapid onset of action and predictable pharmacokinetics that allow . . .