Xarelto vs. Warfarin
See how Xarelto and Warfarin compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Xarelto is a factor Xa inhibitor with fixed dosing and no routine blood testing, while warfarin requires regular INR checks and dose adjustments.
Both drugs reduce stroke risk in atrial fibrillation, but only warfarin is approved for patients with mechanical heart valves.
Xarelto typically costs far more per month than warfarin, which remains one of the least expensive anticoagulants on the market.
Xarelto vs. Warfarin Drug Summary
Xarelto
Xarelto (rivaroxaban) is a factor Xa inhibitor that blocks a specific clotting protein to help prevent and treat dangerous blood clots. It comes as a tablet, usually taken once daily, and does not require routine blood testing to monitor its effect.
Warfarin
Warfarin (warfarin sodium) is a vitamin K antagonist that reduces clot formation by blocking vitamin K-dependent clotting factors. It's taken as a daily tablet, but the dose must be adjusted based on regular INR blood tests.
Xarelto vs. Warfarin Side Effects
Xarelto
Warfarin
Xarelto vs. Warfarin Dosage
Xarelto
Warfarin
| STAGE | DOSE | WHEN |
| Starting dose | 15 mg twice daily | Days 1-21 |
| Maximum dose | 10 mg once daily | If needed |
| Dose changes | 3 increases | Every 21 days |
| STAGE | DOSE | WHEN |
| Starting dose | 2 mg to 5 mg once daily | Days 1-4 |
| Maximum dose | 2 mg to 10 mg once daily | Day 5 onward |
| Dose changes | 1 increase | Every 4 days |
Xarelto
| STAGE | DOSE | WHEN |
| Starting dose | 15 mg twice daily | Days 1-21 |
| Maximum dose | 10 mg once daily | If needed |
| Dose changes | 3 increases | Every 21 days |
Warfarin
| STAGE | DOSE | WHEN |
| Starting dose | 2 mg to 5 mg once daily | Days 1-4 |
| Maximum dose | 2 mg to 10 mg once daily | Day 5 onward |
| Dose changes | 1 increase | Every 4 days |
Xarelto vs. Warfarin Indications
Xarelto
Xarelto is FDA-approved to reduce stroke risk in atrial fibrillation, treat and prevent recurrence of DVT and PE, and prevent clots after hip or knee replacement surgery. It's also approved for VTE prevention in certain hospitalized medical patients. It is not approved for patients with mechanical heart valves.
Stroke prevention in atrial fibrillation
Treatment of DVT and PE
Prevention of DVT/PE recurrence
DVT prevention after hip or knee surgery
Warfarin
Warfarin is FDA-approved to prevent and treat venous thrombosis and pulmonary embolism, and to reduce clot risk in atrial fibrillation and mechanical heart valves. It's also used after a heart attack to lower the risk of death, another heart attack, or stroke. It is not approved for use in pregnancy, except in some mechanical valve patients.
Treatment of venous thrombosis and PE
Clot prevention in atrial fibrillation
Clot prevention with mechanical heart valves
Reduced risk of death or stroke after heart attack
Xarelto vs. Warfarin Pros and Cons
Xarelto
Xarelto offers fixed, predictable dosing without routine blood testing, which makes daily life simpler for many patients. It carries a higher out-of-pocket cost than warfarin and, unlike warfarin, is not approved for patients with mechanical heart valves.
Pros
No routine blood testing required
Simple, fixed once-daily dosing for most uses
Fewer food and drug interactions than warfarin
Reversal agent (andexanet alfa) available for bleeding emergencies
Cons
Roughly $440 to $650 per month without insurance
Not approved for mechanical heart valve patients
Far less long-term real-world safety data than warfarin
Warfarin
Warfarin costs far less than Xarelto and has decades of established use across many conditions. It requires frequent INR monitoring and careful attention to diet and drug interactions, and it remains the only option for patients with mechanical heart valves.
Pros
Roughly $4 to $35 per month, far less costly
Decades of established safety and monitoring data
Approved for mechanical heart valve patients
Effect can be reversed with vitamin K if needed
Cons
Requires regular blood draws to monitor INR levels
Dosing affected by diet, genetics, and many drug interactions
Narrow therapeutic window needs frequent dose changes
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