Rivajon 15mg (rivaroxaban) is a medication used as an anticoagulant, meaning it helps prevent and treat blood clots. It works by inhibiting a specific clotting factor in the blood called Factor Xa, reducing the risk of blood clot formation. This medication is available as a tablet and is prescribed for various conditions, including preventing stroke and heart attack in individuals with atrial fibrillation, and treating and preventing deep vein thrombosis (DVT) and pulmonary embolism (PE).