isoniazid
Drug ingredientThis chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
Where It Comes From
23 FDA-registered drug labelers
A-S Medication Solutions
American Health Packaging
ANUH PHARMA LIMITED
Aphena Pharma Solutions - Tennessee, LLC
Bryant Ranch Prepack
Calyx Chemicals & Pharmaceuticals Limited
Chartwell RX, LLC
CHONGQING HUAPONT SHENGCHEM PHARM. CO., LTD.
CMP Pharma, Inc.
Coupler LLC
DARMERICA, LLC
Genus Lifesciences
Marlex Pharmaceuticals, Inc.
Mylan Institutional Inc.
OMNIVIUM PHARMACEUTICALS LLC.
Preferred Pharmaceuticals, Inc.
Proficient Rx LP
REMEDYREPACK INC.
Sandoz Inc
Second Pharma Co., Ltd.
Teva Pharmaceuticals USA, Inc.
Topchem Pharmaceuticals Ltd
Yuki Gosei Kogyo Co., Ltd.
Why It Matters
Sectors
Health
Downstream Uses
Appears in 1 drug and cosmetic product listings (FDA).
- •isoniazid
FDA Shortage Status
Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."
No Shortage
Shortage History
Each row is a separate manufacturer's FDA shortage filing — not a timeline for the drug as a whole. Multiple "current" entries are normal: each manufacturer/NDC files independently. Status reflects the manufacturer's report; reason describes their supply situation (Available, Unavailable, or to be discontinued).
to be discontinued
Isoniazid Tablet
07/01/2025Vendor Pricing
$0.06/gAaron Chemicals LLC
CountryHong Kong
Pack$32.00 / 500 g
Purity97%
Vendors39 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
38 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| Angene Chemical | China → Hong Kong | $0.07 | 500 g | 98% |
| Chemscene | United States | $0.07 | 1 kg | — |
| A2B Chem LLC | United States | $0.08 | 1 kg | 98% |
| BLD Pharmatech GmbH | Germany | $0.09 | 1 kg | 98% |
| BLD Pharmatech Ltd. | China | $0.09 | 1 kg | 98% |
| AA BLOCKS | United States | $0.09 | 1 kg | 98% |
| Fluorochem EU | Germany | $0.10 | 500 g | 95% |
| BLD Pharmatech Co., Limited | United States | $0.11 | 1 kg | 98% |
| Ambeed, Inc. | United States | $0.11 | 1 kg | 98% |
| Fluorochem UK | United Kingdom | $0.14 | 100 g | 95% |
| AK Scientific Specialized | United States | $0.20 | 1 kg | 95% |
| Apollo Scientific UK | United Kingdom | $0.24 | 100 g | 98% |
| AK Scientific, Inc. | United States | $0.25 | 1 kg | 98% |
| Combi-Blocks, Inc. | United States | $0.25 | 1 kg | 98% |
| Manchester Organics | United Kingdom | $0.35 | 1 kg | — |
| AstaTech, Inc | United States | $0.40 | 100 g | 95% |
| Cayman Europe | Estonia | $0.50 | 100 g | 98% |
| Fulfilled by Molport | Latvia | $0.50 | 10 g | 98% |
| Angene International Limited | United States | $0.53 | 500 g | 98% |
| Sigma-Aldrich (Rush Stock) | Germany | $0.79 | 250 g | 99% |
| Sigma-Aldrich | Germany | $0.79 | 250 g | 99% |
| Life Chemicals Inc. | Ukraine → Canada | $16.00 | 2.5 g | 95% |
| MedKoo Biosciences, Inc | United States | $16.00 | 25 g | 98% |
| Life Chemicals (Europe) | Germany | $21.00 | 1 g | 95% |
| Interbioscreen | Hong Kong | $34.00 | 10 g | 95% |
| ChemDiv, Inc. | United States | $56.00 | 25 g | 90% |
| HTS Biochemie Innovationen | Germany | $170.00 | 5 g | 95% |
| Labotest KG | Germany | $217.80 | 5000 mg | 90% |
| Vitas M Chemical Limited | Hong Kong | $225.00 | 1 g | 90% |
| Molnova | China | $270.00 | 200 mg | 99% |
| TargetMol Chemicals | China → United States | $300.00 | 200 mg | 99.79% |
| MedChemExpress MCE | Sweden | $331.54 | 1 g | 99.95% |
| Apexbio Technology LLC | United States | $1000.00 | 50 mg | 99.61% |
| Otava, Ltd. (2 weeks) | Ukraine | $2724.00 | 50 mg | 90% |
| Key Organics Ltd. | United Kingdom | $2740.00 | 50 mg | 95% |
| Princeton BioMolecular Research (SC) | United States | $4200.00 | 50 mg | 90% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 98% |
| TimTec, LLC | United States | $9333.33 | 30 mg | 99% |
Chemical Identity
CAS54-85-3
PubChem CID3767
DTXSIDDTXSID8020755
FormulaC6H7N3O
Mol. Weight137.14 g/mol
SMILESC1=CN=CC=C1C(=O)NN
Data Sources
37672026-04-07
https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/isoniazid/cids/JSON
Archive: data/sources/pubchem_name/isoniazid.json
CAS 54-85-32026-04-24
https://www.epa.gov/tsca-inventory
Archive: data/sources/tsca/tsca_inventory.csv
CAS 54-85-32026-06-13
https://api.fda.gov/drug/shortages.json
Archive: data/sources/fda/shortages/shortages.json