Drug interactions
Glimepiride-pioglitazone + Rifampin
Severity: Moderate
Glimepiride-pioglitazone and Rifampin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Rifampin induces CYP2C8 and CYP2C9, lowering exposure to both pioglitazone and glimepiride. Loss of glycemic control may result.
What this interaction means in plain words
Glimepiride-pioglitazone and Rifampin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Rifampin induces CYP2C8, CYP2C9 and CYP3A4, increasing metabolism of both components.
What to do
Monitor blood glucose frequently and increase antidiabetic doses as needed. Reduce doses again after rifampin is stopped.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Glimepiride-pioglitazone
Frequently asked questions
Can I take Glimepiride-pioglitazone with Rifampin?
MediHelp rates the interaction as moderate. Glimepiride-pioglitazone and Rifampin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Rifampin induces CYP2C8 and CYP2C9, lowering exposure to both pioglitazone and glimepiride. Loss of glycemic control may result.
How serious is the interaction between Glimepiride-pioglitazone and Rifampin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood glucose frequently and increase antidiabetic doses as needed. Reduce doses again after rifampin is stopped.
What other medicines interact with Glimepiride-pioglitazone?
MediHelp also lists interactions of Glimepiride-pioglitazone with, for example, Fluconazole, Gemfibrozil, Insulin aspart. The full list is on the Glimepiride-pioglitazone page.
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