This is an effective topical anti-fungal medication that can be used on the nails of the hand and feet. The active ingredient is "Tolnaftate" which has been used to treat fungal skin infections such as ringworm, jock itch and athlete's foot. Until recently most topical medications could not penetrate through nails, so oral medications were then used. Now this formulation is able to penetrate nails, requires no drying time, is orderless, and will not stain or leave a residue. You use it twice a day. At least one of the applications should be after showering in order to facilitate absorption. It is usually used 3-6 months depending on your condition. Its shelf life is 5 years, and it has a patient-direct money-back-guarantee!