Drug interactions
Glimepiride-pioglitazone + Simvastatin
Severity: Minor
Glimepiride-pioglitazone and Simvastatin: minor 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
The legacy concern is increased simvastatin myopathy via OATP1B1 inhibition by pioglitazone. Pioglitazone has not been shown to raise statin exposure meaningfully, and the combination is widely used. Pioglitazone may slightly lower simvastatin levels through CYP3A4 induction.
What this interaction means in plain words
Glimepiride-pioglitazone and Simvastatin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Glimepiride-pioglitazone belongs to Endocrine; Simvastatin belongs to Cardiovascular.
Why it happens
Theoretical transporter or CYP3A4 effects of pioglitazone; no established clinical effect.
What to do
No dose change needed; monitor lipid response and ask patients to report muscle symptoms.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Glimepiride-pioglitazone
Other interactions of Simvastatin
- Atazanavir + Simvastatin Contraindicated
- Clarithromycin + Simvastatin Contraindicated
- Cobicistat + Simvastatin Contraindicated
- Cyclosporine + Simvastatin Contraindicated
- Cyclosporin + Simvastatin Contraindicated
- Danazol + Simvastatin Contraindicated
Frequently asked questions
Can I take Glimepiride-pioglitazone with Simvastatin?
MediHelp rates the interaction as minor. Glimepiride-pioglitazone and Simvastatin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. The legacy concern is increased simvastatin myopathy via OATP1B1 inhibition by pioglitazone. Pioglitazone has not been shown to raise statin exposure meaningfully, and the combination is widely used. Pioglitazone may slightly lower simvastatin levels through CYP3A4 induction.
How serious is the interaction between Glimepiride-pioglitazone and Simvastatin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose change needed; monitor lipid response and ask patients to report muscle symptoms.
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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