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

Most common
Major bleeding (3.6%/year)
Pruritus (1% to 10%)
Rash (1% to 10%)
Back pain (common)

Warfarin

Most common
Calciphylaxis (frequency not reported in label)
Cholesterol microembolization (frequency not reported in label)
Purple toes syndrome (frequency not reported in label)
Vasculitis (frequency not reported in label)

Xarelto vs. Warfarin Dosage

Xarelto

Dosage
Dosage Table
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

Dosage
Dosage Table
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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