Drug interactions
Finasteride + Oxcarbazepine
Severity: Minor
Finasteride and Oxcarbazepine: 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
Oxcarbazepine is a weak inducer of CYP3A4 and might lower finasteride exposure modestly. Because finasteride has a wide therapeutic margin, a loss of effect is unlikely to be clinically significant in most patients.
What this interaction means in plain words
Finasteride and Oxcarbazepine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Finasteride belongs to Genitourinary; Oxcarbazepine belongs to Central Nervous System.
Why it happens
Weak induction of CYP3A4 by oxcarbazepine may increase finasteride metabolism.
What to do
No dose change is needed. Reassess if the patient's prostatic or hair-loss response appears diminished during long-term anticonvulsant therapy.
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 Finasteride
- Finasteride + Levoketoconazole Moderate
- Finasteride + Nefazodone Moderate
- Finasteride + Rifampin Moderate
- Finasteride + St john's wort Moderate
- Amobarbital + Finasteride Minor
- Aprepitant + Finasteride Minor
Other interactions of Oxcarbazepine
- Cabotegravir + Oxcarbazepine Contraindicated
- Oxcarbazepine + Rilpivirine Contraindicated
- Artemether / lumefantrine + Oxcarbazepine Major
- Atazanavir + Oxcarbazepine Major
- Benzhydrocodone / acetaminophen + Oxcarbazepine Major
- Bictegravir + Oxcarbazepine Major
Frequently asked questions
Can I take Finasteride with Oxcarbazepine?
MediHelp rates the interaction as minor. Finasteride and Oxcarbazepine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Oxcarbazepine is a weak inducer of CYP3A4 and might lower finasteride exposure modestly. Because finasteride has a wide therapeutic margin, a loss of effect is unlikely to be clinically significant in most patients.
How serious is the interaction between Finasteride and Oxcarbazepine?
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 change is needed. Reassess if the patient's prostatic or hair-loss response appears diminished during long-term anticonvulsant therapy.
What other medicines interact with Finasteride?
MediHelp also lists interactions of Finasteride with, for example, Levoketoconazole, Nefazodone, Rifampin. The full list is on the Finasteride page.
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