5mg · 30-count · Blood Thinners · Brand: Coumadin · Generic available
| Pharmacy | Cash Price | Per-30-Day Equiv. |
|---|---|---|
| Costco Cheapest | $3.80 | $3.80 |
| Walmart | $4.00 | $4.00 |
| Kroger | $5.00 | $5.00 |
| Target | $5.50 | $5.50 |
| Rite Aid | $14.50 | $14.50 |
| CVS | $14.99 | $14.99 |
| Walgreens | $15.50 | $15.50 |
The generic form of Warfarin (Warfarin Na) contains the same active ingredient and is bioequivalent to the brand. Ask your pharmacist to dispense the generic — it works the same way at a fraction of the cost.
Tip: In most states, pharmacists can substitute a generic unless your prescriber writes "dispense as written" (DAW).
Warfarin is prescribed to prevent blood clots, stroke, and other cardiovascular events. It is sold under the brand name Coumadin and is available as the generic Warfarin Na. A standard supply is 30 5mg.
Pharmacy pricing is not regulated in the United States, so retailers set their own cash prices. Large retailers like Walmart and Costco typically offer lower prices on generics because they use prescriptions as a traffic driver. Chain pharmacies like CVS and Walgreens tend to charge significantly more.
Anticoagulants vary dramatically in price. Older drugs like warfarin have cheap generics, while newer DOACs (Eliquis, Xarelto) remain expensive without insurance.
Warfarin belongs to a class of medications called vitamin K antagonist anticoagulants ('blood thinners'), used to prevent and treat blood clots. Unlike some newer anticoagulants, warfarin requires regular blood testing (INR monitoring) to keep the dose in a safe range, and its effect can be significantly changed by diet (particularly vitamin K-rich foods) and many other medications — any dose adjustment should come from your prescriber based on your lab results, never adjusted on your own.
Shop around. The cheapest pharmacy (Costco at $3.80) charges significantly less than the most expensive option ($15.50). A quick call can save you real money.
Ask for the generic. If your doctor prescribed the brand-name Coumadin, ask your pharmacist whether the generic Warfarin Na is available. In most states, pharmacists can substitute a generic unless the prescriber writes 'dispense as written.'
Use a discount card. Services like GoodRx, SingleCare, and WellRx can sometimes negotiate prices lower than retail cash. The estimated GoodRx low for Warfarin is around $3.30.
Because Warfarin is a generic medication, manufacturer-sponsored copay savings cards — the kind commonly offered for newer, brand-name drugs — generally aren't available for it. Coumadin's manufacturer typically doesn't offer a savings card once generic competition exists, though it's worth checking their site directly if your prescriber specifically writes for the brand product. For most patients filling the generic, the discount-card and pharmacy membership options described above are the more realistic way to lower cost.
Coverage depends on your specific plan and formulary. Most blood thinners medications are covered under standard health insurance, typically in Tier 1 or Tier 2. If your copay is higher than the cash price above, it may be cheaper to pay out of pocket — ask your pharmacist to compare. Warfarin itself is an inexpensive generic and is rarely subject to prior authorization, though the INR monitoring it requires is a separate cost and logistics consideration worth discussing with your prescriber.
Prices represent estimated retail cash prices for Warfarin 5mg (30-count) as of 2026. Actual prices may vary. RxCostCheck does not collect or sell your health data. Learn more →
How much does Warfarin cost without insurance?
Without insurance, Warfarin 5mg (30-count) ranges from $3.80 at Costco to $15.50. With a GoodRx discount card, the price can be as low as $3.30.
Where is the cheapest place to fill Warfarin?
Costco typically offers the lowest cash price at $3.80 for 30 5mg.
Is there a generic for Warfarin?
Yes — the generic Warfarin Na is available and bioequivalent to Coumadin. Ask your pharmacist to dispense the generic to save money.
What if my insurance doesn't cover Warfarin at all?
Ask your prescriber whether a covered therapeutic alternative in the same drug class exists, or ask your pharmacist about a formulary exception or medical-necessity appeal — some plans will cover an otherwise-excluded drug once that documentation is on file. In the meantime, the cash and discount-card pricing shown above is usually the fastest fallback.
Does a 90-day supply of Warfarin cost less than three 30-day fills?
Often, yes — many pharmacies and insurance plans price a 90-day fill at a lower effective per-dose cost than separate 30-day fills, and some mail-order pharmacy benefits are built specifically around 90-day supplies. Ask your pharmacist or insurer whether a 90-day option is available for this medication before assuming the count shown above is your only choice.
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