How to Use Take Dapsone Tablet once daily or as prescribed by your doctor. Swallow the tablet whole with water, preferably after meals. Follow your doctor’s dosage instructions strictly. Continue treatment for the full prescribed duration — do not stop early. Ingredients Active Ingredient: Dapsone (25mg / 50mg / 100mg) Inactive Ingredients: Lactose monohydrate, starch, magnesium stearate, and cellulose.