Follow all the usage instructions mentioned on the label or the package insert. Do not apply in larger or smaller quantities than recommended. Wet your hair and apply a sufficient amount of shampoo to the affected areas of the scalp and adjacent areas. Massage thoroughly with the fingertips for about 3 to 5 minutes. Rinse the hair thoroughly with water. Avoid contact with the eyes because it may cause eye irritation. If you experience any skin irritation, treatment should be discontinued.