500mg · 21-count · Antibiotics · Brand: Keflex · Generic available
| Pharmacy | Cash Price | Per-30-Day Equiv. |
|---|---|---|
| Costco Cheapest | $3.70 | $5.29 |
| Walmart | $4.00 | $5.71 |
| Kroger | $4.50 | $6.43 |
| Target | $5.00 | $7.14 |
| Rite Aid | $13.50 | $19.29 |
| CVS | $13.99 | $19.99 |
| Walgreens | $14.50 | $20.71 |
Cephalexin is a prescription antibiotic used to treat bacterial infections. It is sold under the brand name Keflex and is available as the generic Cephalexin. A standard supply is 21 500mg.
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.
Antibiotics are typically short-course prescriptions. Most common antibiotics are available as generics at very low cash prices — many are on Walmart's $4 generic program.
Shop around. The cheapest pharmacy (Costco at $3.70) charges significantly less than the most expensive option ($14.50). A quick call can save you real money.
Ask for the generic. If your doctor prescribed the brand-name Keflex, ask your pharmacist whether the generic Cephalexin 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 Cephalexin is around $3.20.
Coverage depends on your specific plan and formulary. Most antibiotics 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.
Prices represent estimated retail cash prices for Cephalexin 500mg (21-count) as of 2026. Actual prices may vary. RxCostCheck does not collect or sell your health data. Learn more →
How much does Cephalexin cost without insurance?
Without insurance, Cephalexin 500mg (21-count) ranges from $3.70 at Costco to $14.50. With a GoodRx discount card, the price can be as low as $3.20.
Where is the cheapest place to fill Cephalexin?
Costco currently offers the lowest cash price at $3.70 for 21 500mg.
Is there a generic for Cephalexin?
Yes — the generic Cephalexin is available and bioequivalent to Keflex. Ask your pharmacist to dispense the generic to save money.
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