Xarelto is a medicine used in the treatment and prevention of blood clots, which may arise due to deep vein thrombosis (DVT), surgery or atrial fibrillation. The active ingredient of the medicine - rivaroxaban - works by inhibiting vital factors in the blood clotting process.Xarelto is a medicine used in the treatment of deep vein thrombosis (DVT). Untreated DVT can lead to pulmonary embolism, a condition characterised by insufficient blood flow to the lungs. The active ingredient of Xarelto - rivaroxaban - is an oral anticoagulant drug which is well absorbed from the gut. More specifically, Xarelto is a direct factor Xa inhibitor. Factor Xa is an important element of the clotting process. Rivaroxaban, as a result of inhibiting factor Xa, increases the risk of bleeding, not least because the body finds it challenging to clot wounds including nosebleeds. Common side effects associated with Xarelto include muscle pain, itch, bleeding, and pain in the arms or feet.