Antifungal drug for external use. In low concentrations it has fungicidal activity against dermatophytes (Trychophyton rubrum, Trychophyton mentagrophytes, Trychophyton verrucosum, Trychophyton violaceum, Trychophyton tonsurans, Microsporum canis, Epidermophyton floccosum), yeast fungi (mainly Candida albicans) and Pityrosporum orbiculare.
Activity with respect to yeast is fungicidal or fungistatic in nature depending on the type of fungi.
Terbinafine, inhibiting squalene epoxidase in the cell membrane of the fungus (not related to the cytochrome P450 system), specifically suppresses the early stage of the synthesis of sterols in the fungal cell, which leads to ergosterol deficiency, intracellular accumulation of squalene and death of the fungal cell.
Terbinafine has no effect on the metabolism of hormones or other drugs.
The minimum inhibitory concentration (MPC) for Trychophyton rubrum - 0.001-0.06 μg / ml.
In chronic dermatophytias of smooth skin, remission is achieved in 75-95% of patients. Subjective improvement in the treatment of progressive candidiasis of smooth skin and lesions of large and interdigital folds, paronychia caused by Candida albicans and resistant to therapy nystatin, levorin in combination with clotrimazole and miconazole, comes on 3-4 days, and the full resolution of the process - after 3-5 weeks.