montelukast
Drug ingredientThis chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
Where It Comes From
5 FDA-registered drug labelers
A-S Medication Solutions
Camber Pharmaceuticals, Inc.
DIRECT RX
Macleods Pharmaceuticals Limited
Preferred Pharmaceuticals, Inc.
Why It Matters
Sectors
Health
Downstream Uses
Appears in 1 drug and cosmetic product listings (FDA).
- •montelukast sodium
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
Montelukast Sodium Tablet, Chewable
11/17/2025Chemical Identity
CAS158966-92-8
PubChem CID5281040
DTXSIDDTXSID9023334
FormulaC35H36ClNO3S
Mol. Weight586.2 g/mol
SMILESCC(C)(C1=CC=CC=C1CCC(C2=CC=CC(=C2)C=CC3=NC4=C(C=CC(=C4)Cl)C=C3)SCC5(CC5)CC(=O)O)O
Data Sources
52810402026-04-07
https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/montelukast/cids/JSON
Archive: data/sources/pubchem_name/montelukast.json
CAS 158966-92-82026-04-25
https://open.fda.gov/data/ndc/
Archive: data/sources/fda/ndc/ndc.json
CAS 158966-92-82026-06-13
https://api.fda.gov/drug/shortages.json
Archive: data/sources/fda/shortages/shortages.json