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    HomeMedication GuideDrug InteractionsPioglitazone + Rifampin
    Moderate interaction

    Does Pioglitazone Interact With Rifampin?

    (2.3 , 7.1) CYP2C8 inducers (e.g., rifampin) may decrease pioglitazone concentrations.

    Reviewed by the OmniRx Health clinical teamLast reviewed Jul 4, 2026

    Severity: Moderate

    Severity basis: drug interactions section (keywords: may decrease). Combining Pioglitazone (Thiazolidinedione) and Rifampin (Rifamycin antibiotic (strong CYP3A4 inducer)) is classified as a moderate interaction.

    What to Do

    Use this combination with caution. Your prescriber may monitor you more closely or adjust doses.

    How This Interaction Works

    Interactions like this one can happen when two medicines have overlapping effects, or when one changes how the other is absorbed, broken down, or cleared from the body. Pioglitazone is a thiazolidinedione and Rifampin is a rifamycin antibiotic (strong cyp3a4 inducer); together they are documented as a moderate interaction. How much this matters depends on your dose, your other medications, and your overall health.

    If You Take Both Medications

    If you have been prescribed both Pioglitazone and Rifampin, do not start, stop, or change either medication on your own — some medicines are unsafe to stop suddenly. Tell your prescriber and pharmacist that you take both so they can decide whether the combination is right for you, adjust the dose, monitor you more closely, or suggest an alternative.

    From the FDA Label

    (2.3 , 7.1) CYP2C8 inducers (e.g., rifampin) may decrease pioglitazone concentrations.

    Source: FDA structured product labeling (set_id 0331400c-b163-4856-bfb0-965470247cb3).

    Pioglitazone

    Thiazolidinedione

    Brands: Actos

    View Pioglitazone safety profile

    Rifampin

    Rifamycin antibiotic (strong CYP3A4 inducer)

    Brands: Rifadin

    View Rifampin safety profile

    Check these against your full medication list in our free Interaction Checker

    Frequently Asked Questions

    Can you take Pioglitazone and Rifampin together?

    Pioglitazone and Rifampin have a documented moderate interaction. Use this combination with caution. Your prescriber may monitor you more closely or adjust doses.

    How serious is the Pioglitazone and Rifampin interaction?

    It is classified as a moderate interaction, based on the FDA label's drug interactions section (keywords: may decrease). A moderate interaction can be clinically meaningful and usually calls for monitoring or a dose adjustment.

    What should I do if I'm taking both Pioglitazone and Rifampin?

    If you have been prescribed both Pioglitazone and Rifampin, do not start, stop, or change either medication on your own — some medicines are unsafe to stop suddenly. Tell your prescriber and pharmacist that you take both so they can decide whether the combination is right for you, adjust the dose, monitor you more closely, or suggest an alternative.

    This information is educational — not medical advice.

    This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.

    Questions About Your Medications?

    A licensed OmniRx provider can review your full medication list and help you understand what's safe for you — no office visit required.

    Other Rifampin Interactions