Pioglitazone and Rifampin interaction
Pioglitazone and Rifampin: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Pioglitazone (Actos) label · effective 2025-03-28
• CYP2C8 inducers (e.g., rifampin) may decrease pioglitazone concentrations.
CYP2C8 Inducers An inducer of CYP2C8 (e.g., rifampin) may significantly decrease the exposure (AUC) of pioglitazone.
From the Rifampin (Rifadin IV) label · effective 2026-05-27
Decrease exposure Digitoxin Decrease exposure Fluoroquinolones Pefloxacin Administered with rifampin 900 mg daily Decrease exposure Moxifloxacin , Decrease exposure Oral Hypoglycemic Agents (e.g., sulfonylureas) Glyburide Decrease exposure Rifampin may worsen glucose control of glyburide.
Decrease exposure Selective 5-HT3 Receptor Antagonists Ondansetron Decrease exposure Statins Metabolized by CYP3A4 Simvastatin Decrease exposure Thiazolidinediones Rosiglitazone Decrease AUC by 66% Tricyclic Antidepressants Nortriptyline A tuberculosis treatment regimen including rifampin (600 mg/day), isoniazid (300 mg/day), pyrazinamide (500 mg 3× per day),…
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.