Rivaroxaban, sold under the brand name Xarelto among others, is an anticoagulant medication (blood thinner) used to treat and prevent blood clots. Specifically it is used to treat deep vein thrombosis and pulmonary emboli and prevent blood clots in atrial fibrillation and following hip or knee surgery. It is taken by mouth.
Common side effects include bleeding. Other serious side effects may include spinal hematoma and anaphylaxis. It is unclear if use in pregnancy and breastfeeding is safe. Compared to warfarin it has fewer interactions with other medications. It works by blocking the activity of the clotting protein factor Xa.
Rivaroxaban was patented in 2007 and approved for medical use in the United States in 2011. In the United States, it will not be available as a generic medication until 2024. It is on the World Health Organization's List of Essential Medicines. In 2020, it was the 86th most commonly prescribed medication in the United States, with more than 8 million prescriptions.
In those with non-valvular atrial fibrillation, it appears to be as effective as warfarin in preventing ischemic strokes and embolic events. Rivaroxaban is associated with lower rates of serious and fatal bleeding events than warfarin, though rivaroxaban is associated with higher rates of bleeding in the gastrointestinal tract.
In July 2012, the UK's National Institute for Health and Clinical Excellence recommended rivaroxaban to prevent and treat venous thromboembolism.
Because of the difficulty associated with managing bleeding, rivaroxaban should be discontinued at least 24 hours before surgery, then restarted as soon as adequate hemostasis is established.
Dosing recommendations do not recommended administering rivaroxaban with drugs known to be strong combined CYP3A4/P-glycoprotein inhibitors because this results in significantly higher plasma concentrations of rivaroxaban.
The most serious adverse effect is bleeding, including severe internal bleeding.
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