These antifungal preparations contains the active ingredient, Terbinafine which is a broad spectrum antifungal and is effective against skin infections caused by fungus, yeasts and moulds such as ringworm, hots spots and Schnauzer bumps. It is more effective than other topical antifungals (eg. Clotrimazole and Oxiconazole) because it kills fungus causing the skin infections (fungicidal) and does not just inhibit the growth of fungus (fungistatic). It has shorter duration of treatment in comparison to other topical antifungals. It is considered to act through inhibition of fungal sterol synthesis. It works by preventing the formation of substances needed by the fungus to grow