Is terbinafine an antibiotic?

No. Terbinafine is not an antibiotic. It is an antifungal medication used to treat fungal infections of the skin and nails (such as athlete’s foot, ringworm, and nail fungus).

Key points:
- How it works: It inhibits fungal squalene epoxidase, blocking ergosterol synthesis and killing the fungus.
- Forms: topical (cream/gel) for skin infections and oral tablets for more stubborn nail or skin infections.
- Not for bacteria: Antibiotics target bacteria; antifungals like terbinafine target fungi.
- Safety: Oral terbinafine can cause liver toxicity in rare cases—watch for symptoms like yellowing eyes/skin, dark urine, severe fatigue, or abdominal pain. It can interact with some other drugs; talk to a clinician if you have liver disease or take other medications.
- If you were told to take an antibiotic for a fungal infection, check with your healthcare provider about using an antifungal like terbinafine instead.

If you have a specific infection in mind or a prescription, I can give more details.