An antifungal agent for topical use is allylamine and has a wide range of antifungal activity. It differs by pronounced epidermotropy. The target for terbinafine is the cytoplasmic membrane of the fungal cell.
Terbinafine acts at the early stages of sterol metabolism, at the level of the squalene epoxidase cycle. Suppressing the enzyme with squalene epoxidase, terbinafine inhibits the formation of ergosterol - the main component of the cell wall of fungi, preventing their further reproduction. The squalene epoxidase is not bound to the P450 system.
Fungicidal effect is due to the accumulation of squalene in the fungal cell, which is extracted from membranes, lipid components. Accumulating inside the cells, lipid granules, gradually increasing in volume, rupture the damaged cytoplasmic membranes, leading the fungal cell to death. Terbinafine highly active against all dermatophytes united in labor Trichophyton, Microsporum and Epidermophyton.
Terbinafine in small concentrations has a fungicidal effect against dermatophytes (Trichophyton rubrum, T.mentagrophytes, T.verrucosum, T. violaceum; Microsporum canis and Epidermophyton floccosum); molds (Aspergillus sppScopulariopis brevicaulis), yeast-like - Candida albicans, C.stellatoidea, C.tropicalis, C.parapsilosis, C.guillermondi, C.kursei, C.pseudotropicalis, Pityrosporum orbiculare (P.ovale and Malassezia furfur); of dimorphic fungi (Sporothrix schenckii and np.).
The effect of terbinafine on yeast-like fungi, depending on their type, may be fungicidal (Candida parapsilosis) or fungistatic (Candida . albicans).
Fungoterbin ® also has anti-inflammatory, antipruritic, keratolytic action. Due to the presence of urea in the cream, the preparation has a moisturizing effect, promotes deeper penetration of terbinafine into the skin.