Drug interactions
Glimepiride-pioglitazone + Ritonavir
Severity: Moderate
Glimepiride-pioglitazone and Ritonavir: 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
Ritonavir has mixed effects on CYP enzymes and can alter glimepiride and pioglitazone levels unpredictably. Protease inhibitors also cause insulin resistance and hyperglycemia, so glycemic control may be affected either way.
What this interaction means in plain words
Glimepiride-pioglitazone and Ritonavir 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.
Glimepiride-pioglitazone belongs to Endocrine; Ritonavir belongs to Anti Virals.
Why it happens
Variable CYP inhibition and induction by ritonavir, plus protease inhibitor-related insulin resistance.
What to do
Monitor blood glucose closely when ritonavir is started or stopped and adjust antidiabetic doses accordingly.
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
Other interactions of Ritonavir
- Alfuzosin + Ritonavir Contraindicated
- Amiodarone + Ritonavir Contraindicated
- Avanafil + Ritonavir Contraindicated
- Colchicine + Ritonavir Contraindicated
- Dronedarone + Ritonavir Contraindicated
- Eletriptan + Ritonavir Contraindicated
Frequently asked questions
Can I take Glimepiride-pioglitazone with Ritonavir?
MediHelp rates the interaction as moderate. Glimepiride-pioglitazone and Ritonavir 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. Ritonavir has mixed effects on CYP enzymes and can alter glimepiride and pioglitazone levels unpredictably. Protease inhibitors also cause insulin resistance and hyperglycemia, so glycemic control may be affected either way.
How serious is the interaction between Glimepiride-pioglitazone and Ritonavir?
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 closely when ritonavir is started or stopped and adjust antidiabetic doses accordingly.
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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