Rivaroxaban is an anticoagulant medication that helps prevent blood clots. It works by inhibiting a specific protein in the blood called Factor Xa, which plays a crucial role in the clotting process. By blocking this protein, rivaroxaban reduces the risk of conditions such as deep vein thrombosis (DVT) and pulmonary embolism (PE), which can occur after surgery or in patients with certain medical conditions. This medication is often prescribed for patients who have undergone hip or knee replacement surgery, as well as those with atrial fibrillation, a heart condition that increases the risk of stroke. Rivaroxaban is taken orally, usually once daily, and does not require regular blood monitoring like some other anticoagulants.