Terboderm 250mg Tablet belongs to the group of medications known as antifungals. It is used to treat a variety of fungal infections on the skin and nails, including ringworm. Terboderm 250 mg Tablet is an antifungal medication. It works by destroying and inhibiting the growth of the fungus that causes the infection. The dose and duration of medication are determined by the condition being treated. Make sure you take the entire dose that your doctor has suggested. This will ensure that the illness is entirely healed and won't return.