Terbisil Lotion 20ml (Terbinafine Hydrochloride 1%)Terbisil Lotion 20ml Terbinafine Hydrochloride 1% Antifungal Lotion Prescription required. Available at Derma. pk. Terbisil Lotion 20ml contains Terbinafine Hydrochloride 1%, an allylamine antifungal agent that inhibits squalene epoxidase, blocking ergosterol biosynthesis in the fungal cell membrane and leading to fungal cell death. It is indicated for superficial fungal skin infections. Use only as directed by a licensed physician or dermatologist.