Drug interactions
Cobicistat + Etravirine
Severity: Major
Cobicistat and Etravirine: 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
Etravirine induces CYP3A4 and may reduce cobicistat concentrations, weakening the boosting effect on the protease inhibitor. This can lower protease inhibitor exposure and risk virologic failure.
What this interaction means in plain words
Cobicistat and Etravirine 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.
Cobicistat belongs to Miscellaneous; Etravirine belongs to Anti Virals.
Why it happens
Etravirine induction of CYP3A4 lowers cobicistat and boosted drug levels.
What to do
Avoid the combination and use a ritonavir-boosted regimen or alternative agents per HIV specialist guidance.
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 Cobicistat
- Alfuzosin + Cobicistat Contraindicated
- Apalutamide + Cobicistat Contraindicated
- Cobicistat + Colchicine Contraindicated
- Cobicistat + Dronedarone Contraindicated
- Cobicistat + Eletriptan Contraindicated
- Cobicistat + Eplerenone Contraindicated
Other interactions of Etravirine
- Efavirenz + Etravirine Contraindicated
- Etravirine + Isavuconazole Contraindicated
- Amobarbital + Etravirine Major
- Apalutamide + Etravirine Major
- Carbamazepine + Etravirine Major
- Deflazacort + Etravirine Major
Frequently asked questions
Can I take Cobicistat with Etravirine?
MediHelp rates the interaction as major. Cobicistat and Etravirine 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. Etravirine induces CYP3A4 and may reduce cobicistat concentrations, weakening the boosting effect on the protease inhibitor. This can lower protease inhibitor exposure and risk virologic failure.
How serious is the interaction between Cobicistat and Etravirine?
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 and use a ritonavir-boosted regimen or alternative agents per HIV specialist guidance.
What other medicines interact with Cobicistat?
MediHelp also lists interactions of Cobicistat with, for example, Alfuzosin, Apalutamide, Colchicine. The full list is on the Cobicistat page.
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