Drug interactions
Erythromycin + Finasteride
Severity: Minor
Erythromycin and Finasteride: 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
Erythromycin may modestly raise finasteride concentrations, but finasteride is well tolerated across a broad exposure range, so clinical significance is small.
What this interaction means in plain words
Erythromycin and Finasteride have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Erythromycin belongs to Anti Bacterial; Finasteride belongs to Genitourinary.
Why it happens
Inhibition of CYP3A4-mediated metabolism of finasteride.
What to do
No dose adjustment is needed; routine awareness is enough.
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 Erythromycin
- Conivaptan + Erythromycin Contraindicated
- Dihydroergotamine intranasal + Erythromycin Contraindicated
- Dihydroergotamine + Erythromycin Contraindicated
- Domperidone + Erythromycin Contraindicated
- Dronedarone + Erythromycin Contraindicated
- Droperidol + Erythromycin Contraindicated
Other interactions of Finasteride
- Finasteride + Levoketoconazole Moderate
- Finasteride + Nefazodone Moderate
- Finasteride + Rifampin Moderate
- Finasteride + St john's wort Moderate
- Amobarbital + Finasteride Minor
- Aprepitant + Finasteride Minor
Frequently asked questions
Can I take Erythromycin with Finasteride?
MediHelp rates the interaction as minor. Erythromycin and Finasteride have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Erythromycin may modestly raise finasteride concentrations, but finasteride is well tolerated across a broad exposure range, so clinical significance is small.
How serious is the interaction between Erythromycin and Finasteride?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose adjustment is needed; routine awareness is enough.
What other medicines interact with Erythromycin?
MediHelp also lists interactions of Erythromycin with, for example, Conivaptan, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Erythromycin page.
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