It can treat skin, hair and nail infections caused by Trichophyton, canine Microsporum and flocculent epidermal tinea. It can also treat various ringworm diseases, skin yeast infection caused by Candida and onychomycosis caused by Trichoderma. Terbinafine hydrochloride is an antifungal drug, which inhibits squalene cyclooxygenase in the process of ergosterol synthesis in fungal cells, and makes squalene accumulate in cells to play a bactericidal role.