Drug interactions
Pioglitazone + Ritonavir
Severity: Moderate
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 inhibits CYP3A4 and may raise pioglitazone exposure, though CYP2C8 is the main pathway. Ritonavir can also impair glucose metabolism, so glycemic effects are unpredictable.
What this interaction means in plain words
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.
Pioglitazone belongs to Endocrine; Ritonavir belongs to Anti Virals.
Why it happens
Inhibition of CYP3A4 reduces pioglitazone clearance, together with ritonavir-related insulin resistance.
What to do
Monitor blood glucose and for edema or heart failure signs after starting or stopping ritonavir. Adjust the pioglitazone dose 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 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 Pioglitazone with Ritonavir?
MediHelp rates the interaction as moderate. 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 inhibits CYP3A4 and may raise pioglitazone exposure, though CYP2C8 is the main pathway. Ritonavir can also impair glucose metabolism, so glycemic effects are unpredictable.
How serious is the interaction between 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 and for edema or heart failure signs after starting or stopping ritonavir. Adjust the pioglitazone dose accordingly.
What other medicines interact with Pioglitazone?
MediHelp also lists interactions of Pioglitazone with, for example, Insulin aspart-insulin aspart protamine, Insulin aspart, Insulin degludec-insulin aspart. The full list is on the Pioglitazone page.
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