Xarelto is an anticoagulant (blood thinner) that has been widely prescribed to prevent blood clots in patients suffering from atrial fibrillation (arrhythmia of the heart); deep vein thrombosis (blood clots deep within the body); pulmonary embolism (blood clots in the lungs); stroke; and patients who have recently undergone a knee or hip replacement surgery. It generally is prescribed as an alternative to Warfarin (Coumadin), a blood thinner that began to be used in 1954. Approved in 2011, Xarelto (rivaroxaban) is one of the newest blood thinners on the market and is manufactured by Bayer and marketed by Johnson & Johnson’s subsidiary, Janssen Pharmaceuticals, in the United States.
The most dangerous side effect for people taking Xarelto is uncontrollable bleeding – a risk shared by all blood thinners. Some top heart doctors are concerned about Xarelto’s safety.