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Get Isoniazid for as low as $115.08, which is 73% off the average retail price of $426.80 for the most common version, by using a GoodRx coupon.
| Dosage | Quantity | Retail price | GoodRx price |
|---|
| Dosage | Quantity | Retail price | GoodRx price |
|---|
| 100mg | 30 tablets | N/A | $11.72 |
| 300mg | 30 tablets | $124.72 | $12.27 |
| 50mg/ 5ml | 473 ml | $373.91 | $115.08 |
Popular offers
Get an extra $7.00 off Isoniazid and up to 90% off all prescriptions. Gold plans start at just $9.99/mo. Cancel any time.*
GoodRx coupon prices last updated on 04/22/26.
*Prices subject to change without notice. Sales tax may apply and is not included.
