How RxDiff Works
- Search your medication — Enter the exact name on your prescription to start a free price comparison.
- Compare pharmacies — Review prices at CVS, Walgreens, Walmart, Costco, and 70,000+ pharmacies.
- Show your free card — Present the free RxDiff card at checkout and save on your prescription.
Why Patients Choose RxDiff
- Completely free — no account, no insurance, no strings attached
- Works at 70,000+ pharmacies nationwide
- Save up to 80% on 3,500+ prescription medications
- Prices often beat insurance copays
Prescription Savings Guides
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- SingleCare vs GoodRx: Which Saves More?
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- 2026 Prescription Drug Price Data
RxDiff vs Other Discount Cards
Why Prescription Prices Vary So Much
The same drug can cost $4 at one pharmacy and $160 at another just a few miles away. Insurance copays are frequently higher than the cash price with a discount card. Pharmacies negotiate individual contracts with each discount program — so the lowest price depends on which card you use and which pharmacy you go to.
RxDiff searches every major discount program and 70,000+ pharmacy locations simultaneously, so you see the single lowest price for your exact medication before you leave the house.
Sample Drug Prices With a Free RxDiff Card
- Metformin — as low as $4 at Walmart vs. $18+ at many pharmacies
- Lisinopril — as low as $5 at Walmart vs. $30 at Walgreens
- Atorvastatin — as low as $10 at Costco vs. $60+ at Rite Aid
- Omeprazole — as low as $4 at Walmart vs. $35 at CVS
- Gabapentin — as low as $8 at Walmart vs. $50 at Walgreens
- Sertraline — as low as $9 at Walmart vs. $40 at Rite Aid
Prices vary by location, dosage, and quantity. Always compare before you fill — the difference can be significant.
Frequently Asked Questions
Is RxDiff free?
Yes. RxDiff is completely free. There is no account, no sign-up, no insurance, and no hidden fees of any kind. The RxDiff discount card is free to use at any participating pharmacy.
Does RxDiff work without insurance?
Yes — RxDiff is designed for both insured and uninsured patients. In many cases the cash price with an RxDiff discount card is lower than your insurance copay, even with good coverage.
Which pharmacies accept RxDiff?
RxDiff works at 70,000+ pharmacies including CVS, Walgreens, Walmart, Costco, Kroger, Rite Aid, Publix, and most independent pharmacies. Enter your ZIP code in the search tool to see all participating locations near you.