Ringworm is among the many fungal infections of the skin and nails that can be treated with a 250 mg tablet of Tercan. One antifungal medication is Tercan 250mg Tablet. It functions by eliminating and halting the growth of the infection-causing fungus. What you are being treated for will determine the dosage and length of treatment. As directed by your physician, make sure you finish the entire dosage. By doing this, the infection will be totally eradicated and won't recur.