Prescription savings
Stop paying too much for your prescriptions. Compare prices, get pharmacy coupons, and save up to 80%.Resources
About GoodRx
Health conditions
Medications & treatment
Access & affordability
Well-being
Medication discounts

Get Isoniazid for as low as $17.13, which is 84% off the average retail price of $104.30 for the most common version, by using a GoodRx coupon.


| Dosage | Quantity | Retail price | GoodRx price |
|---|---|---|---|
| 100mg | 30 tablets | $8.99 | $8.47 |
| 300mg | 30 tablets | $82.37 | $17.13 |









250+ medications are free, with hundreds more under $10. Plans start at $9.99/mo. (when paid yearly). Terms apply.
GoodRx coupon prices last updated on 08/14/26.