Drug interactions
Etravirine + Fesoterodine
Severity: Minor
Etravirine and Fesoterodine: 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
Etravirine is a CYP3A4 inducer and may lower exposure to the active metabolite of fesoterodine. This could reduce control of overactive bladder symptoms, though the effect is likely modest.
What this interaction means in plain words
Etravirine and Fesoterodine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Etravirine belongs to Anti Virals; Fesoterodine belongs to Genitourinary.
Why it happens
Induction of CYP3A4 increases clearance of the active metabolite of fesoterodine.
What to do
Monitor urinary symptom control and adjust the fesoterodine dose within the labeled range if the response is inadequate.
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 Fesoterodine
Other interactions of Etravirine
- Efavirenz + Etravirine Contraindicated
- Etravirine + Isavuconazole Contraindicated
- Amobarbital + Etravirine Major
- Apalutamide + Etravirine Major
- Carbamazepine + Etravirine Major
- Cobicistat + Etravirine Major
Frequently asked questions
Can I take Etravirine with Fesoterodine?
MediHelp rates the interaction as minor. Etravirine and Fesoterodine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Etravirine is a CYP3A4 inducer and may lower exposure to the active metabolite of fesoterodine. This could reduce control of overactive bladder symptoms, though the effect is likely modest.
How serious is the interaction between Etravirine and Fesoterodine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor urinary symptom control and adjust the fesoterodine dose within the labeled range if the response is inadequate.
What other medicines interact with Fesoterodine?
MediHelp also lists interactions of Fesoterodine with, for example, Bethanechol, Clozapine, Levoketoconazole. The full list is on the Fesoterodine page.
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