Frequently Asked Questions
How does RxDiff work?
RxDiff searches 70,000+ pharmacies and multiple prescription discount programs simultaneously to find the lowest price for your medication near you. Enter your drug name, select your dosage and quantity, and enter your ZIP code. You'll instantly see the lowest price at each nearby pharmacy along with a free discount card to use at checkout. No account or insurance required.
Is RxDiff free to use?
Yes. RxDiff is completely free. There is no account required, no insurance needed, and no hidden fees of any kind. The free discount card is also free to use at the pharmacy.
How is RxDiff different from GoodRx?
Unlike GoodRx, which shows prices from its own discount program, RxDiff compares multiple discount programs simultaneously to find the absolute lowest price at pharmacies near you. We also don't require an account or personal information to search prices.
Which pharmacies does RxDiff work at?
RxDiff works at 70,000+ pharmacies nationwide including CVS, Walgreens, Walmart, Kroger, Costco, Rite Aid, Publix, and most independent and regional pharmacies. Coverage varies slightly by medication — search your drug to confirm availability near you.
Do I need insurance to use RxDiff?
No. RxDiff works for anyone regardless of insurance status. It is especially helpful for uninsured patients or those whose insurance copay is higher than the discount price. You can use the discount card instead of — or in addition to checking — your insurance each time you fill.
How much can I save with RxDiff?
Savings vary by medication and pharmacy. Common generics like metformin can cost as low as $4 at Walmart vs $35 at CVS — an 89% difference. GLP-1 medications like Ozempic or Wegovy cost over $1,000/month at retail; savings cards can reduce this significantly. RxDiff always shows you the lowest available price at pharmacies near you.
Is RxDiff a prescription discount card?
RxDiff is a prescription price comparison platform. It searches multiple discount programs and pharmacy prices to find the lowest available price — then provides a free discount card to use at the pharmacy. You can download or display the card digitally; no physical card is required.
Can I use RxDiff with Medicare or Medicaid?
Yes — the free RxDiff discount card can be used by anyone regardless of insurance type. However, you generally cannot use a discount card at the same time as Medicare or Medicaid at the pharmacy counter. Present whichever gives you the lower price. Manufacturer copay cards are generally not usable with government insurance programs.
Does RxDiff work for brand-name medications?
Yes. RxDiff covers both generic and brand-name medications. For expensive brand-name drugs, also check whether a manufacturer savings card is available — these can sometimes reduce costs further for commercially insured patients. See our manufacturer coupons page for a list of available savings programs.
How do I use my RxDiff discount card?
Search for your medication, select your dosage and pharmacy, then tap or click to view the free discount card. Show the card to your pharmacist — they will enter the BIN, PCN, and Group numbers to apply the discount price. The entire process takes under a minute and requires no prior enrollment.