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- W2528289968 abstract "Routine prophylaxis is recommended to prevent venous thromboembolism (VTE) – manifesting as deep vein thrombosis (DVT) and/or pulmonary embolism (PE) – in patients undergoing major orthopaedic surgery. Rivaroxaban (BAY 59-7939) is a novel, oral, direct Factor Xa inhibitor in development for the prevention and treatment of VTE. The efficacy and safety of 5–9 days’ prophylaxis with rivaroxaban were investigated in three randomized, double-blind, phase IIb trials in patients undergoing elective, total hip or knee replacement (THR or TKR), relative to subcutaneous enoxaparin. Two trials (one in patients undergoing THR, N=722; and one in patients undergoing TKR, N=621) investigated twice-daily (bid) rivaroxaban (at total daily doses of 5–60 mg); the third (in patients undergoing THR, N=873) investigated once-daily (od) rivaroxaban (at doses of 5, 10, 20, 30 or 40 mg od). Rivaroxaban – at all doses tested – had similar efficacy to enoxaparin in the bid trials. This promising finding was strengthened by the od trial, in which the observed incidences of the primary efficacy endpoint (DVT, non-fatal PE or all-cause mortality) were lower in patients receiving rivaroxaban 5, 10, 20, 30 and 40 mg od (14.9%, 10.6%, 8.5%, 13.5% and 6.4%, respectively) than enoxaparin (25.2%). Although there was no significant dose–response relationship between rivaroxaban and the primary efficacy endpoint in these trials, there was with major VTE (proximal DVT, PE or VTE-related death; p=0.0072) in the od trial (incidences were 8.5%, 2.7%, 0.9%, 1.9% and 1.1% with rivaroxaban 5, 10, 20, 30 and 40 mg od, respectively, vs 2.8% with enoxaparin). Significant dose–response relationships between rivaroxaban and major bleeding were observed in all three trials. In the bid trials, major bleeding rates with rivaroxaban were similar to those with enoxaparin at total daily doses of 5–20 mg. In the od trial, major bleeding occurred in 2.3%, 0.7%, 4.3%, 4.9% and 5.1% of patients receiving rivaroxaban 5, 10, 20, 30 and 40 mg od, respectively, and in 1.9% of those receiving enoxaparin. Rivaroxaban was generally well tolerated in the bid and od trials, and the incidence of nausea and vomiting with early post-operative oral rivaroxaban administration was low for all doses tested. The bid trials suggest that oral rivaroxaban at total daily doses of 5–20 mg may be a safe and effective alternative to enoxaparin for the prevention of VTE after major orthopaedic surgery. The od trial suggests that the more-convenient od regimen is feasible and that 10 mg od, a dose within the range identified by the bid trials, should be investigated further. As a result, oral rivaroxaban 10 mg od is currently being investigated in four phase III trials for the prevention of VTE after major orthopaedic surgery (the RECORD trials)." @default.
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- W2528289968 date "2009-03-01" @default.
- W2528289968 modified "2023-09-24" @default.
- W2528289968 title "RIVAROXABAN (BAY 59-7939) – A NOVEL, ORAL, DIRECT FACTOR XA INHIBITOR – FOR PREVENTION OF VENOUS THROMBOEMBOLISM AFTER MAJOR ORTHOPAEDIC SURGERY: OVERVIEW OF THREE PHASE II TRIALS" @default.
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