Get a free BuzzRx warfarin coupon and save up to 80%. Warfarin sodium (Coumadin) is a commonly prescribed, inexpensive, and effective anticoagulant. Warfarin is a prescription medicine that is used to prevent new blood clots or to treat blood clots such as deep vein thrombosis (DVT) and pulmonary embolism (PE). The retail price for the most common version of generic warfarin is on average $20.32 per 30 day supply. With your free BuzzRx savings card or coupon, you could save even more at any pharmacy in our network, including Walgreens, CVS, Rite Aid, and more. Ask your pharmacist to enter your BuzzRx prescription coupon when you drop off the prescription to ensure you're getting the best savings.