Rivaroxaban

Is rivaroxaban safe?

Rivaroxaban, sold as Xarelto, is an effective blood thinner that trades one bleeding risk for another. In ROCKET AF, the 14,264-patient trial against warfarin in atrial fibrillation, overall major bleeding was about the same (3.6% against 3.5% a year). Bleeding into the brain and fatal bleeding were lower on rivaroxaban, but stomach and gut bleeding was higher.

We score it 61, below apixaban (64) because apixaban cut major bleeding in its own trial and rivaroxaban did not, and well above warfarin (49) because it needs no INR tests and caused fewer of the worst bleeds. A middling score does not mean it should be stopped. Stopping without another anticoagulant raises the risk of stroke, which is one of the two parts of its boxed warningBoxed warningThe strongest safety warning the US FDA puts on a medicine's label, printed inside a black border at the top.More in the glossary.

How does rivaroxaban compare with warfarin?

The US label gives the bleeding results from ROCKET AF:

Per year	Rivaroxaban	Warfarin
Major bleeding	3.6%	3.5%
Bleeding into the brain	0.5%	0.7%
Stomach and gut bleeding	2.0%	1.2%
Fatal bleeding	0.2%	0.5%

For preventing strokes, rivaroxaban was at least as good as warfarin: 1.7% against 2.2% a year in the main per-protocol analysis. More people stopped rivaroxaban because of bleeding (4.3% against 3.1%). For someone with a history of stomach ulcers or gut bleeding, that row of the table matters most, and it is worth raising with the prescriber.

The food rule

The 15 mg and 20 mg tablets need food to be absorbed properly. In 2019 the UK's MHRA issued a reminder after a small number of reports of clots in people who had taken these doses on an empty stomach. The US label says to take the atrial fibrillation dose with the evening meal. The 2.5 mg and 10 mg tablets can be taken with or without food. If swallowing is hard, the tablets can be crushed and mixed with water or apple puree, followed by food.

Doses on the US label

• Atrial fibrillation: 20 mg once a day with the evening meal, or 15 mg if creatinine clearance is 50 mL/min or lower.
• DVT or pulmonary embolism: 15 mg twice a day with food for 21 days, then 20 mg once a day with food; 10 mg once a day to prevent a recurrence after at least 6 months.
• After hip or knee replacement: 10 mg once a day for 35 or 12 days.
• Coronary or leg artery disease: 2.5 mg twice a day with aspirin 75 to 100 mg.

Once-daily dosing is convenient, but the effect fades within about a day, so a missed dose leaves a gap. For once-daily doses the label says to take a missed tablet as soon as you remember, never two on the same day.

Interactions and other blood thinners

Rivaroxaban has no food interactions beyond the absorption rule, and far fewer drug interactions than warfarin. The label says to avoid ketoconazole and ritonavir, which raise levels, and rifampin, carbamazepine, phenytoin and St John's wort, which lower them. Erythromycin is a problem in people with reduced kidney function.

The bigger everyday risk is stacking bleeding drugs. Aspirin, clopidogrel, NSAIDs such as ibuprofen and naproxen, and SSRI or SNRI antidepressants all add to it. Some people with heart disease take rivaroxaban with aspirin on purpose, at the low 2.5 mg dose; that is a decision for the cardiologist.

Overdose and reversal

Very large doses are partly self-limiting, because the gut absorbs little more above about 50 mg. Rivaroxaban still cannot be removed by dialysis, and the September 2026 US label says no specific reversal agent is available, after the antidote andexanet alfa left the US market in December 2025. Hospitals use clotting-factor concentrates. For a suspected overdose or a child who swallowed tablets, call Poison Control (1-800-222-1222) in the US or NHS 111 in the UK.

Who should be careful

• People with prosthetic heart valves, including after TAVR: the label does not recommend rivaroxaban, because the GALILEO trial found more deaths and bleeding.
• People with antiphospholipid syndrome, severe kidney disease or a history of gut bleeding.
• Anyone having surgery, an epidural or a spinal injection: the label advises stopping at least 24 hours before procedures, as decided by the team.
• Pregnant women: the label warns of bleeding around delivery.

Talk to your doctor or pharmacist before stopping, switching or adding any medicine.

How we scored it

Dependence (98) and track record (87) are strong. Serious side effects (48) reflect bleeding rates similar to warfarin with more gut bleeding, and regulatory warnings (38) reflect the boxed warningBoxed warningThe strongest safety warning the US FDA puts on a medicine's label, printed inside a black border at the top.More in the glossary and valve restriction. Interactions (52) and overdose marginOverdose marginHow far a normal dose is from a harmful one. A wide margin means an accidental extra dose is unlikely to cause serious harm.More in the glossary (58) are moderate, held back by the food rule and the lack of a US antidote.