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Product Information

ISONIAZID 100 MG TABLET is a generic product labeled by Teva Pharmaceuticals USA Inc., priced at $1.7322 per EA under NDC 00555006602. Its NADAC has been published 315 times since Nov 28, 2013.

FDA first approved this application before 1982.

ISONIAZID 100 MG TABLET

Isoniazid
$1.7322per EA

Strength

100 mg/1

NDC

00555006602

Classification

Generic

Dosage Form

TABLET

Route

ORAL

Effective Date

6/17/2026

Active Ingredients

ISONIAZID

Approval Type

Generic (ANDA)

FDA Application

ANDA080936

FDA Approved

Before 1982

On Market Since

9/1/1972

Pharmacological Classes

Antimycobacterial

Price Statistics

The NADAC for ISONIAZID 100 MG TABLET has been published 315 times since Nov 28, 2013, and over the history we have for it it has risen 348.3%. The table below summarizes its recorded NADAC range and movement.

Current price$1.7322 per EA
All-time high$1.7322 (Aug 19, 2026)
All-time low$0.0649 (Feb 18, 2015)
52-week high$1.7322
52-week low$1.6016
Median price$0.0853
Average price$0.2926
Largest weekly change+1450.7% (Nov 19, 2025)
Weeks tracked315
Tracking sinceNov 28, 2013

Price History

1W

0.0%

1M

0.0%

3M

+1.6%

6M

+6.1%

1Y

+1577.2%

3Y

+1929.8%

5Y

+1929.8%

All

+348.3%

Generic Alternatives

No other NADAC-published product shares this drug's active ingredient and strength in a comparable dosage form. Compare the broader picture on the Isoniazid market page.

Lowest-Cost Alternatives

No alternatives available

No alternatives found with the same active ingredient and strength in a comparable dosage form.

Related Drugs

Same classification

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ETHAMBUTOL HCL 100 MG TABLET
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68180028001•Lupin Pharmaceuticals Inc.
$0.3100
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ETHAMBUTOL HCL 100 MG TABLET
Generic
54879000101•STI Pharma LLC
$0.3452
per EA
ETHAMBUTOL HCL 400 MG TABLET
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42806010201•Epic Pharma LLC
$0.4575
per EA
ETHAMBUTOL HCL 400 MG TABLET
Generic
68084028001•American Health Packaging
$0.4575
per EA
ETHAMBUTOL HCL 400 MG TABLET
Generic
68180028101•Lupin Pharmaceuticals Inc.
$0.4575
per EA
ETHAMBUTOL HCL 400 MG TABLET
Generic
54879000201•STI Pharma LLC
$0.4866
per EA
PYRAZINAMIDE 500 MG TABLET
Generic
00054081221•Hikma Pharmaceuticals USA Inc.
$1.3276
per EA
PYRAZINAMIDE 500 MG TABLET
Generic
00054081222•Hikma Pharmaceuticals USA Inc.
$1.3276
per EA

Frequently asked questions

What is the NADAC price of ISONIAZID 100 MG TABLET?

The current National Average Drug Acquisition Cost (NADAC) for ISONIAZID 100 MG TABLET, manufactured by Teva Pharmaceuticals USA Inc., is $1.7322 per EA (NDC 00555006602), effective Aug 19, 2026.

How has the price of ISONIAZID 100 MG TABLET changed over time?

Over the history we have for it, the NADAC for ISONIAZID 100 MG TABLET has risen 348.3%. It has been tracked across 315 weekly CMS publications since Nov 28, 2013.

What are the highest and lowest recorded NADAC prices for ISONIAZID 100 MG TABLET?

Since Nov 28, 2013, the NADAC for ISONIAZID 100 MG TABLET has ranged from a low of $0.0649 (Feb 18, 2015) to a high of $1.7322 (Aug 19, 2026), with a median of $0.0853 per EA.

Are there cheaper alternatives to ISONIAZID 100 MG TABLET?

No other NADAC-published product currently shares the active ingredient and strength of ISONIAZID 100 MG TABLET in a comparable dosage form, so no direct lower-cost alternative is listed.

Who manufactures ISONIAZID 100 MG TABLET?

ISONIAZID 100 MG TABLET (NDC 00555006602) is labeled by Teva Pharmaceuticals USA Inc., and CMS classifies it as a generic product.