Dapsone Tablet is an antibiotic medicine that is used in combination with few other medicines to treat leprosy, an infectious disease that mainly affects the skin, eyes, nose and peripheral nerves. It may take time to reach the effective dose as the medication is started at a low dose and increased slowly over time to avoid side effects. However, once the effective dose is reached, it starts showing improvement in your condition within a few days. Follow your doctors instructions carefully and avoid missing any dose to get maximum benefit.