Product Information
ISONIAZID 300 MG TABLET is a generic product labeled by Chartwell RX LLC, priced at $3.4917 per EA under NDC 62135070990. Its NADAC has been published 93 times since Jul 31, 2024.
FDA first approved this application on Jun 13, 1988.
Strength
300 mg/1
Manufacturer
Chartwell RX LLCNDC
62135070990
Classification
Generic
Dosage Form
TABLET
Route
ORAL
Effective Date
8/19/2026
Active Ingredients
ISONIAZIDApproval Type
Generic (ANDA)
FDA Application
ANDA089776FDA Approved
6/13/1988
On Market Since
6/13/1988
Pharmacological Classes
Price Statistics
The NADAC for ISONIAZID 300 MG TABLET has been published 93 times since Jul 31, 2024, and over the history we have for it it has risen 1559.2%. The table below summarizes its recorded NADAC range and movement.
| Current price | $3.4917 per EA |
|---|---|
| All-time high | $3.5124 (Aug 12, 2026) |
| All-time low | $0.2104 (Jul 31, 2024) |
| 52-week high | $3.5124 |
| 52-week low | $2.6149 |
| Median price | $3.0768 |
| Average price | $2.2898 |
| Largest weekly change | +1311.5% (May 21, 2025) |
| Weeks tracked | 93 |
| Tracking since | Jul 31, 2024 |
Generic Alternatives
The matcher finds 3 manufacturers offering a NADAC-published product with this drug's active ingredient and strength in a comparable dosage form (cheapest from each manufacturer, up to 10 shown below). None of the shown alternatives sit below the current price. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
Frequently asked questions
What is the NADAC price of ISONIAZID 300 MG TABLET?
The current National Average Drug Acquisition Cost (NADAC) for ISONIAZID 300 MG TABLET, manufactured by Chartwell RX LLC, is $3.4917 per EA (NDC 62135070990), effective Aug 19, 2026.
How has the price of ISONIAZID 300 MG TABLET changed over time?
Over the history we have for it, the NADAC for ISONIAZID 300 MG TABLET has risen 1559.2%. It has been tracked across 93 weekly CMS publications since Jul 31, 2024.
What are the highest and lowest recorded NADAC prices for ISONIAZID 300 MG TABLET?
Since Jul 31, 2024, the NADAC for ISONIAZID 300 MG TABLET has ranged from a low of $0.2104 (Jul 31, 2024) to a high of $3.5124 (Aug 12, 2026), with a median of $3.0768 per EA.
Are there cheaper alternatives to ISONIAZID 300 MG TABLET?
3 manufacturers publish a NADAC-priced product with the same active ingredient and strength as ISONIAZID 300 MG TABLET in a comparable dosage form, but none are currently priced below it.
Who manufactures ISONIAZID 300 MG TABLET?
ISONIAZID 300 MG TABLET (NDC 62135070990) is labeled by Chartwell RX LLC, and CMS classifies it as a generic product.