Coumadin
Generic Warfarin · tablet · Rx required · Anticoagulant.
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The lowest verified cash price for Coumadin 5 mg is $3.50 at Blink Health, based on 7 verified pharmacy prices checked August 27, 2026.
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How much does Coumadin cost without insurance?
The lowest verified cash price for Coumadin 5 mg is $3.50 at Blink Health, based on 7 verified pharmacy prices checked August 27, 2026. Across 7 verified pharmacy prices, cash costs range from $3.50 to $43.00. These are cash prices, no insurance or signup is required, and for many generics the cash price beats a typical insurance copay. Prices vary by pharmacy, location, quantity, and eligibility; confirm the final price at the counter.
About Coumadin
Coumadin is a brand of Warfarin, a cardiovascular medication supplied as tablet in a 5 mg strength. It is commonly used for anticoagulant.
An FDA-approved generic (Warfarin) is available and typically costs less than the brand, compare both cash prices in the results above before you fill.
Ways to save on Coumadin
Choosing the generic (Warfarin) instead of the brand can lower your cost, on average about $122.60 per fill (96% off the brand price) in our catalog, though the exact price varies by pharmacy, location, quantity, and eligibility. Compare the live cash and discount prices above, and ask about a 90-day supply if you take it long-term.
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Clinical information
Typical dosing
Mechanism: inhibits vitamin K epoxide reductase, which blocks activation of clotting factors II, VII, IX, and X, and proteins C and S. Dosing is NOT one-size-fits-all, it is individualized entirely by INR response: • Typical starting dose: 2-5 mg once daily (many patients end up on 2-10 mg/day). • Elderly, malnourished, or liver-impaired patients: start LOWER (often 2.5 mg or less), they're more sensitive to warfarin's effect. • Target INR: 2.0-3.0 for most indications (afib, DVT/PE); 2.5-3.5 for a mechanical mitral valve or certain high-risk mechanical valves, your prescriber sets your specific target. • Dose is adjusted in small increments (5-20%) based on INR trend, never by guesswork.
Monitoring
INR (International Normalized Ratio) blood test: checked every 2-3 days when starting or adjusting dose, then weekly, then extended to every 4 weeks (every 4-6 weeks once stable). More frequent checks are needed after any change in diet, illness, new medication, or missed doses.
Side effects
Bleeding is the primary risk (see boxed warning), from minor bruising and gum bleeding to serious GI or intracranial hemorrhage. Rare: skin necrosis (usually in the first days of therapy, more common with protein C/S deficiency), "purple toe syndrome."
Interactions to know
Warfarin has dozens of clinically significant interactions, always use a drug-interaction checker or ask your pharmacist before starting or stopping ANY medication, including OTC and herbal products. Notable examples that increase bleeding risk or INR: amiodarone, trimethoprim-sulfamethoxazole (TMP-SMX/Bactrim), fluconazole and other azole antifungals, macrolide antibiotics (azithromycin, clarithromycin, erythromycin), NSAIDs (ibuprofen, naproxen), aspirin, and many others. St. John's wort and some other supplements can lower warfarin's effect and increase clotting risk.
Pregnancy & breastfeeding
Warfarin is teratogenic and can cause fetal warfarin syndrome (nasal hypoplasia, skeletal and CNS abnormalities) with exposure in the first trimester, and fetal bleeding risk later in pregnancy. It is contraindicated in pregnancy EXCEPT in specific situations your cardiologist/OB may decide together (e.g. certain mechanical heart valves where alternatives carry unacceptable clotting risk). Anyone who could become pregnant should discuss contraception and alternative anticoagulants with their prescriber.
Additional notes
Reversal (only under medical supervision): vitamin K (phytonadione) for elevated INR or bleeding; 4-factor prothrombin complex concentrate (PCC) is the preferred rapid-reversal agent for serious bleeding or urgent surgery (faster and more complete than plasma); fresh frozen plasma (FFP) is an alternative when PCC isn't available. Dietary: keep vitamin-K intake (leafy greens, etc.) CONSISTENT week to week rather than avoiding it, sudden increases or decreases both throw off INR control. Special populations: elderly patients need lower starting doses and closer monitoring due to increased sensitivity and interacting medications.
Clinical content reviewed by the BetterBuyRx clinical team, on 2026-07-07. Read the full wiki entry and sources →
Frequently asked questions
How much does Coumadin cost without insurance?
The lowest verified cash price for Coumadin 5 mg is $3.50 at Blink Health, based on 7 verified pharmacy prices checked August 27, 2026. These are cash prices, no insurance or signup needed, and refresh at least every 72 hours.
Is generic Warfarin the same as Coumadin?
Yes. The FDA requires generics to contain the same active ingredient at the same strength as the brand. Inactive ingredients (binders, dyes) may differ.
How much can I save by choosing the generic?
On average $122.60 per fill (96% off the brand price). Savings vary by pharmacy, see live prices above.
Do I need insurance to get this price?
No. The prices shown on BetterBuyRx are cash prices. Often these beat insurance copays for generics.
How often is this price updated?
At minimum every 72 hours. Many sources refresh every few hours.
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Important safety information
Boxed warning
BOXED WARNING: Warfarin can cause major or fatal bleeding, including gastrointestinal and intracranial (brain) hemorrhage. Bleeding risk is highest when starting therapy and when the INR is above the target range. Regular INR monitoring is required for the life of the prescription, never skip lab draws. Seek emergency care for severe headache, black/bloody stool, coughing/vomiting blood, or unusual bruising/bleeding.
Narrow-therapeutic-index medication
This is a narrow-therapeutic-index medication. Do not switch between brand and generic manufacturers without close monitoring by your prescriber. Small differences in absorption can cause treatment failure or toxicity.
Information for general comparison only. Not medical advice. Confirm with your pharmacist.