Drug interactions
Orforglipron + Ritonavir
Severity: Major
Orforglipron and Ritonavir: major 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 OATP1B transporters, which may substantially raise orforglipron exposure and increase gastrointestinal adverse effects.
What this interaction means in plain words
Orforglipron and Ritonavir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Orforglipron belongs to Endocrine; Ritonavir belongs to Anti Virals.
Why it happens
Inhibition of CYP3A4 metabolism and OATP1B uptake of orforglipron.
What to do
Avoid the combination. Use an antiretroviral regimen without dual CYP3A4/OATP inhibition, or monitor tolerability closely.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Orforglipron
- Orforglipron + Simvastatin Moderate
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 Orforglipron with Ritonavir?
MediHelp rates the interaction as major. Orforglipron and Ritonavir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Ritonavir inhibits CYP3A4 and OATP1B transporters, which may substantially raise orforglipron exposure and increase gastrointestinal adverse effects.
How serious is the interaction between Orforglipron and Ritonavir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination. Use an antiretroviral regimen without dual CYP3A4/OATP inhibition, or monitor tolerability closely.
What other medicines interact with Orforglipron?
MediHelp also lists interactions of Orforglipron with, for example, Simvastatin. The full list is on the Orforglipron page.
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