__WHAT GRISOL IS AND WHAT IT IS USED FOR?__ . GRISOL contains the active ingredient griseofulvin. . Griseofulvin is a member of a group of medicines called “antifungals”. . GRISOL works by killing the fungi that causes athlete’s foot. . Fungal infection of the skin may cause itching and soreness and can easily spread by contact and is often picked up in shared changing rooms and showers. . GRISOL contains 400 micrograms of griseofulvin per spray. . Once picked up the fungus grows quickly in the warm and moist areas. . Symptoms include itching, scaly or cracking skin and sometimes with pain