Fungal infections of the skin caused by dermatophytes such as trichophyton (e.g. rubrum, T. mentagrophytes, T. verrucosum, T. violaceum), Microsporum canis and Epidermophyton floccosum. Oral Terbinafine should only be used to treat extensive, severe ringworm infections ( tinea corporis, tinea cruris and tinea pedis). Oral Terbinafine is not effective against vaginal candidiasis or pityriasis (tinea) versicolor.Onychomycoses ( tinea unguium, ringworm of the nails) due to infection with dermatophyte organisms ( hyphomycetes).