The short version
Just 2 companies supply this market — thin enough that a single exit would be felt immediately.
Market view
isoniazid · Solution
2 marketed package NDCs · 2 active manufacturers
Most dispensed: 300 mg · Tablet · #100 tablets/bottle · 100 mg · Tablet · #100 tablets/bottle · 300 mg · Tablet · #30 tablets/bottle · 300 mg · Tablet · #30 tablets/bottle, plastic
What changed in the last 90 days
Every detected change for isoniazid, newest first — price moves, shortages, recalls, and manufacturers entering or leaving. Detected by comparing each day’s federal data against the day before.
- isoniazidAug 19, 2026Price downNADAC $3.51239 → $3.49169 per unit (-0.59%)
- isoniazidAug 19, 2026Price downNADAC $3.51239 → $3.49169 per unit (-0.59%)
- IsoniazidAug 19, 2026Price downNADAC $3.51239 → $3.49169 per unit (-0.59%)
- IsoniazidAug 19, 2026Price downNADAC $3.51239 → $3.49169 per unit (-0.59%)
- IsoniazidAug 19, 2026Price downNADAC $3.51239 → $3.49169 per unit (-0.59%)
- IsoniazidAug 19, 2026Price downNADAC $3.51239 → $3.49169 per unit (-0.59%)
- IsoniazidAug 19, 2026Price downNADAC $3.51239 → $3.49169 per unit (-0.59%)
- IsoniazidAug 19, 2026Price downNADAC $3.51239 → $3.49169 per unit (-0.59%)
- IsoniazidAug 12, 2026Mfr exitedAmerican Health Packaging · isoniazid
- IsoniazidJul 22, 2026Price upNADAC $3.41328 → $3.51239 per unit (+2.9%)
Same drug class
Other molecules FDA puts in Antimycobacterial, with whether each is in shortage right now. Same class is not the same drug — substitution is a clinical decision, and this is a supply picture, not a recommendation.
Common questions
- Is Isoniazid in shortage right now?
- No. FDA does not currently list Isoniazid in shortage. This page is rebuilt every morning from FDA's shortage database, so a new posting appears here the day it is published.
- Who makes Isoniazid?
- 21 companies have marketed Isoniazid in the last 30 days, according to the FDA NDC Directory. Every manufacturer and package is listed on this page.
- What does Isoniazid cost?
- The typical pharmacy pays about $3.49 per unit, based on the most recent CMS NADAC survey of actual acquisition costs. That is what the pharmacy pays for the drug itself — not the cash price, and not what an insurer is billed.
All marketed products
Expand a strength to see its dosage forms, then package sizes, then each manufacturer and NDC. Click an NDC for its full detail page.