Rivaroxaban (RXA; brand name Xarelto®) is an oral direct factor Xa inhibitor that is applied for prophylaxis of venous thromboembolism after major orthopedic surgery. Additionally, RXA is approved by Swissmedic to be used at a therapeutic dose for primary therapy of VTE and for prophylaxis of cerebrovascular events in non-valvular atrial fibrillation.