Rivaroxaban

Key facts

• Rivaroxaban (brand name Xarelto) is a direct oral anticoagulant, or DOAC. It blocks factor Xa, a protein the body needs to form blood clots.
• You usually take it once daily with food, which helps you absorb it fully, and it needs no routine blood testing.
• Never stop rivaroxaban without medical advice. Stopping it suddenly sharply raises your risk of a stroke or clot; your prescriber will tell you exactly when to pause it before surgery.
• Seek urgent care for black or bloody stools, blood in urine or vomit, a sudden severe headache, or bruising that spreads.

What rivaroxaban treats

Rivaroxaban prevents stroke and blood clots in people with atrial fibrillation. It treats deep vein thrombosis and pulmonary embolism and prevents them recurring. It is also used for several weeks after hip or knee replacement surgery to prevent clots forming in the leg veins, and in some people with coronary or peripheral artery disease to lower the risk of a further clot-related event.

How rivaroxaban works

Rivaroxaban binds directly to factor Xa, an enzyme in the clotting cascade that converts prothrombin into thrombin. Blocking it means far less thrombin is generated, so blood is much slower to clot. Because it targets one specific step at a fixed dose, its effect is predictable and, unlike warfarin, needs no routine blood-level monitoring.

Before you take it

• Your prescriber will lower your dose if you have reduced kidney function; rivaroxaban is partly cleared by the kidneys and can build up to dangerous levels if they decline.
• Tell your prescriber about any bleeding disorder, active stomach ulcer, liver disease, or recent surgery.
• Rivaroxaban has far fewer food interactions than warfarin and needs no vitamin K monitoring, though taking the higher treatment doses with food matters for absorption. It still interacts with other blood thinners, some antifungal and HIV medicines, and regular high-dose anti-inflammatory painkillers.
• Avoid it in pregnancy or breastfeeding unless your prescriber advises otherwise.

Side effects

Common effects include easy bruising, minor nosebleeds, and mild stomach upset.

Stop and seek urgent medical care for any of these:

• Black or tarry stools, blood in urine or vomit, or bleeding that will not stop.
• A sudden severe headache, confusion, or weakness on one side of the body.
• Unusual or spreading bruising, or heavy bleeding after a minor injury.

Safety essentials

• Do not stop taking rivaroxaban abruptly or skip doses without medical advice. Stopping suddenly is strongly linked to clots and stroke; ask your prescriber when to pause it before any surgery or dental work.
• Kidney function determines your dose. Tell your prescriber about any new kidney problem or dehydration, since worsening function can mean your current dose is now too high.
• Rivaroxaban still carries a serious bleeding risk even though it needs none of the food restrictions warfarin does; tell every clinician you take it before any procedure.

This page is educational and does not replace advice from a doctor or pharmacist who knows your health history.