Terbinafine

Hello Anon

This is something you should ideally ask your pharmacist. This medication is usually used to treat fungal infections; often of the feet.

Some antifungals can affect birth control effectiveness but yours is considered reasonably safe. But you need to check with your pharmacist/doctor first or use a back-up method until your anti-fungal treatment is complete and the medication is out of your system (which may be longer than a day or two).
Best,
Susan