rifaximin
Drug ingredientThis chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.
Where It Comes From
18 FDA-registered drug labelers
A-S Medication Solutions
Alfasigma SpA
Aurobindo Pharma Limited
AX Pharmaceutical Corp
Bausch Health Companies Inc.
Cambrex Profarmaco Milano S.r.l.
Cardinal Health 107, LLC
Chemeca Drugs Private Limited
Clarochem Ireland Ltd.
Granules India Limited
Hetero Drugs Limited
LUPIN LIMITED
MSN Laboratories Private Limited
Olon SpA
Optimus Drugs Private Limited
Salix Pharmaceuticals, Inc.
SUN PHARMACEUTICAL INDUSTRIES, INC.
Willow Birch Pharma, Inc.
Why It Matters
Sectors
Health
Downstream Uses
Appears in 1 drug and cosmetic product listings (FDA).
- •Xifaxan
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 FDA shortage records
Chemical Identity
CAS80621-81-4
PubChem CID6436173
DTXSIDDTXSID7045998
FormulaC43H51N3O11
Mol. Weight785.9 g/mol
SMILESCC1C=CC=C(C(=O)NC2=C(C3=C(C4=C(C(=C3O)C)OC(C4=O)(OC=CC(C(C(C(C(C(C1O)C)O)C)OC(=O)C)C)OC)C)C5=C2N6C=CC(=CC6=N5)C)O)C
Data Sources
64361732026-04-07
https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/rifaximin/cids/JSON
Archive: data/sources/pubchem_name/rifaximin.json
CAS 80621-81-42026-04-25
https://open.fda.gov/data/ndc/
Archive: data/sources/fda/ndc/ndc.json
bulk match2026-04-07
https://open.fda.gov/data/ndc/
Archive: data/sources/fda/ndc/ndc.json