Active substance
Isoniazid
- SFDA 4
- US FDA 46
- Health Canada 3
- US price lines 2
- NHS prices 2
- WHO EML 1
- Safety 3
SFDA Saudi Arabia — SFDA human drug list
| Trade name | Strength | Form · route | Pack | Public price | Type | Company | Status |
|---|---|---|---|---|---|---|---|
| ISONIAZID 100MG TABLET | 100 mg | Tablet · Oral use | 100 Blister | SAR 15.70 | Generic · Prescription | Macleods Pharmaceuticals Ltd. | Valid |
| ISONIAZID 300MG TABLET | 300 mg | Tablet · Oral use | 100 Blister | SAR 38.20 | NCE · Prescription | Macleods Pharmaceuticals Ltd. | Valid |
| I.N.H | 100 mg | Tablet · Oral use | 100 Tablet Container | SAR 7.25 | NCE · Prescription | THE NILE COMPANY FOR PHARMACEUTICALS AND CHEMICAL IND. | Invalid · Not Marketed |
| RIMIFON 100MG TAB | 100 mg | Tablet · Oral use | 100 Tablet Container | SAR 18.10 | NCE · Prescription | ROCHE | Withdrawn by MAH · Not Marketed |
Indications — CHI Daman Drug Formulary
HUMAN IMMUNODEFICIENCY VIRUS; LATENT TUBERCULOSIS; RENAL TRANSPLANT; TUBERCULOSIS
US FDA United States — FDA approvals (Drugs@FDA)
| Product | Strength | Form · route | Applicant | Status | First approved |
|---|---|---|---|---|---|
| ISONIAZID | 50MG/5ML | syrup · oral | CMP PHARMA INC | Prescription | 10 Nov 1983 |
| ISONIAZID | 100MG; 300MG | tablet · oral | OMNIVIUM PHARMS | Prescription | 26 Jun 1997 |
| ISONIAZID | 50MG/5ML | syrup · oral | CHARTWELL RX | Prescription | 21 Jul 1997 |
| ISONIAZID | 100MG/ML | injectable · injection | SANDOZ | Prescription | 5 Jul 2005 |
| ISONIAZID | 100MG; 300MG | tablet · oral | THEPHARMANETWORK LLC | Prescription | 29 Oct 2014 |
| NYDRAZID | 100MG/ML **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons** | injectable · injection | SANDOZ | Discontinued | 29 Sep 1952 |
| ISONIAZID | 100MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**; 300MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons** | tablet · oral | EPIC PHARMA LLC | Discontinued | 17 Nov 1952 |
| ISONIAZID | 100MG | tablet · oral | SUN PHARM INDUSTRIES | Discontinued | 13 Nov 1970 |
| ISONIAZID | 100MG | tablet · oral | WHITEWORTH TOWN PLSN | Discontinued | 14 Apr 1971 |
| DOW-ISONIAZID | 300MG | tablet · oral | DOW PHARM | Discontinued | 4 Nov 1971 |
| STANOZIDE | 100MG; 300MG | tablet · oral | EVERYLIFE | Discontinued | 21 Jan 1972 |
| ISONIAZID | 100MG | tablet · oral | WATSON LABS | Discontinued | 3 Feb 1972 |
| ISONIAZID | 100MG; 300MG | tablet · oral | HIKMA INTL PHARMS | Discontinued | 28 Feb 1972 |
| ISONIAZID | 300MG | tablet · oral | WATSON LABS | Discontinued | 28 Feb 1972 |
| ISONIAZID | 50MG | tablet · oral | WATSON LABS | Discontinued | 28 Feb 1972 |
| ISONIAZID | 100MG | tablet · oral | MK LABS | Discontinued | 16 Mar 1972 |
| ISONIAZID | 100MG | tablet · oral | GENUS LIFESCIENCES | Discontinued | 24 Aug 1972 |
| ISONIAZID | 300MG | tablet · oral | GENUS LIFESCIENCES | Discontinued | 24 Aug 1972 |
| ISONIAZID | 100MG | tablet · oral | IMPAX LABS | Discontinued | 1 Aug 1973 |
| ISONIAZID | 300MG | tablet · oral | IVAX SUB TEVA PHARMS | Discontinued | 15 Jan 1974 |
| ISONIAZID | 100MG | tablet · oral | NEXGEN PHARMA INC | Discontinued | 22 Oct 1974 |
| LANIAZID | 50MG; 100MG | tablet · oral | CHARTWELL MOLECULAR | Discontinued | 29 Aug 1975 |
| ISONIAZID | 50MG; 100MG | tablet · oral | PHOENIX LABS NY | Discontinued | 18 Dec 1975 |
| ISONIAZID | 300MG | tablet · oral | SUN PHARM INDUSTRIES | Discontinued | 11 May 1976 |
| ISONIAZID | 100MG | tablet · oral | PHARMAVITE | Discontinued | 29 Jul 1976 |
21 more — full table
Canada Canada — marketed products (Health Canada)
| Brand | DIN | Strength | Form · route | Company |
|---|---|---|---|---|
| PDP-ISONIAZID | 00577790 | 100 MG | TABLET · ORAL | PENDOPHARM DIVISION OF PHARMASCIENCE INC |
| PDP-ISONIAZID | 00577804 | 300 MG | TABLET · ORAL | PENDOPHARM DIVISION OF PHARMASCIENCE INC |
| PDP-ISONIAZID | 00577812 | 50 MG / 5 ML | SOLUTION · ORAL | PENDOPHARM DIVISION OF PHARMASCIENCE INC |
Prices — United States and England
| Source | Product as listed | Price | Unit / pack | Date |
|---|---|---|---|---|
| US NADAC | ISONIAZID 100 MG TABLET | $1.73222 | per EA | 17 Jun 2026 |
| US NADAC | ISONIAZID 300 MG TABLET | $3.40199 | per EA | 23 Sep 2026 |
| NHS Drug Tariff | Isoniazid 100mg tablets | £54.34 | 28 tablet | 1 Oct 2026 |
| NHS Drug Tariff | Isoniazid 50mg tablets | £23.81 | 56 tablet | 1 Oct 2026 |
NADAC: average price US retail pharmacies pay to buy the medicine. NHS Drug Tariff Part VIIIA: basic price reimbursed to pharmacies in England and Wales.
WHO WHO Model List of Essential Medicines (2025)
- 6.2.5. Antituberculosis medicines · core
Tuberculosis
Oral > Solid > dispersible tablet: 100 mg (scored) (EMLc) | Oral > Solid > tablet: 100 mg; 300 mg
Safety signals and safety-related labeling changes
- US FDA 5 Dec 2025 RIFATER — safety-related labeling change
Labeling sections changed: Contraindications; Warnings and Precautions; Adverse Reactions; Drug Interactions; Patient Counseling Information / Patient Information / Medication Guide - US FDA 5 Feb 2025 ISONIAZID — safety-related labeling change
Labeling sections changed: Contraindications; Warnings and Precautions; Adverse Reactions - US FDA 5 Feb 2025 NYDRAZID — safety-related labeling change
Labeling sections changed: Warnings and Precautions; Adverse Reactions
Combinations containing Isoniazid
Values as published by each source: SFDA human drug list (4-2026, as published by the Council of Health Insurance; indications from the CHI Daman Drug Formulary), Drugs@FDA, EMA medicines data, Health Canada Drug Product Database (Open Government Licence – Canada), CMS NADAC, NHS Drug Tariff Part VIIIA (NHSBSA Copyright, Open Government Licence v3.0), WHO Model List of Essential Medicines (CC BY 3.0 IGO; regrouped by active substance, not created by WHO), EMA PRAC, US FDA safety-related labeling changes and MHRA Drug Safety Update (Open Government Licence v3.0). Sources and reuse. Not a substitute for the official registers or the product information.