Isoniazid
13 NDCs across 7 manufacturers|13 Generic,0 Brand
Isoniazid is used to treat tuberculosis, per the National Library of Medicine's MED-RT classification.
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The brand product was first FDA-approved before 1982, and the first generic was approved Jan 1, 1982. In 2024, Medicare Part D spent $352K on Isoniazid across 36,000 claims for 13,000 beneficiaries.
Isoniazid is available as 13 NDCs from 7 manufacturers (13 generic, 0 brand), with NADAC prices from $1.73 to $3.51 per EA — the most expensive product costs about 2.0× the cheapest. Every pack size and labeler in this drug market is compared side-by-side below.
Total NDCs
13
13G / 0B
Manufacturers
7
competing in market
Price Spread
$1.73 – $3.51
per EA, 12 of 13 NDCs
7d Activity
avg -2.6% WoW · of 13 NDCs
Market Price Trend
Monthly average NADAC per unit, split by generic and brand.
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Top supplier
Teva Pharmaceuticals USA Inc. manufacturer profile
Open the supplier page for the manufacturer with the strongest footprint in this market.
Lead class
Antimycobacterial class view
See how this market rolls up into the broader therapeutic class and compare other drugs in the same bucket.
Trend hub
Latest market trends
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Guide
How to interpret NADAC
Review the benchmark methodology behind the prices and spreads shown on this market page.
Manufacturer Breakdown
7 manufacturers producing ISONIAZID(1 pricing outlier)
| Drug ↕ | Price | 7d Change ↕ |
|---|---|---|
ISONIAZID 300 MG TABLET | $3.5124 per EA | — |
ISONIAZID 300 MG TABLET | $3.4020 per EA | -2.57% |
ISONIAZID 300 MG TABLET | $3.4020 per EA | -2.57% |
ISONIAZID 300 MG TABLET | $3.4020 per EA | -2.57% |
ISONIAZID 300 MG TABLET | $3.4020 per EA | -2.57% |
ISONIAZID 300 MG TABLET | $3.4020 per EA | -2.57% |
ISONIAZID 300 MG TABLET | $3.4020 per EA | -2.57% |
ISONIAZID 300 MG TABLET | $3.4020 per EA | -2.57% |
ISONIAZID 300 MG TABLET | $3.4020 per EA | -2.57% |
ISONIAZID 100 MG TABLET | $1.7322 per EA | — |
ISONIAZID 100 MG TABLET | $1.7322 per EA | — |
ISONIAZID 100 MG TABLET | $1.7322 per EA | — |
ISONIAZID 50 MG/5 ML SOLUTION | $0.3100 per ML | — |
Frequently Asked Questions
What is Isoniazid used to treat?
Isoniazid is used to treat tuberculosis, per the National Library of Medicine's MED-RT classification.
When did Isoniazid become available as a generic?
FDA approved the first generic Isoniazid (ANDA) on Jan 1, 1982.
How much does Medicare spend on Isoniazid?
In 2024, Medicare Part D spent $352K on Isoniazid across 36,000 claims for 13,000 beneficiaries.
How many Isoniazid products are on the market?
The Isoniazid drug market contains 13 NDCs from 7 manufacturers — 13 generic and 0 brand products.
What is the price range for Isoniazid?
NADAC reference prices for Isoniazid range from $1.7322 to $3.5124 per EA — the most expensive product costs about 2.0× the cheapest. 1 additional product is priced per a different unit (e.g. liquids per ML) and isn't directly comparable.
Which manufacturers make Isoniazid?
7 manufacturers list Isoniazid in NADAC. Ranked by number of NDCs, the largest are Teva Pharmaceuticals USA Inc. (3), Genus Lifesciences Inc. (3), Omnivium Pharmaceuticals LLC (3), American Health Packaging (1), Mylan Institutional LLC (1).
How has the price of Isoniazid changed recently?
Over the past 7 days, 0 Isoniazid NDCs rose and 8 fell, with a market-wide average change of -2.6%.