Xarelto 20 mg Tablet is a blood thinner medicine. It is used to treat and prevent blood clot formation in conditions such as deep vein thrombosis (DVT, blood clots that form in the deep veins of the body, usually in the thigh or lower leg), pulmonary embolism (PE, blood clots that block one or more arteries in the lungs), and atrial fibrillation (AFib, irregular heart rhythm that may increase the risk of blood clots). It may also be used to prevent clot formation post knee or hip surgery.