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Get Isoniazid for as low as $12.51, save up to 80% off the average retail price for the most common version, by using a GoodRx coupon.
| Dosage | Quantity | Retail price | GoodRx price |
|---|---|---|---|
| 100mg | 30 tablets | N/A | $11.72 |
| 300mg | 30 tablets | $124.21 | $12.27 |
| Dosage | Quantity | Retail price | GoodRx price |
|---|---|---|---|
| 50mg/ 5ml | 473 ml | $363.34 | $115.08 |
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GoodRx coupon prices last updated on 05/01/26.
