Dapsone is an antibiotic medication primarily used to treat leprosy and certain skin conditions, such as dermatitis herpetiformis. It works by inhibiting the growth of bacteria and reducing inflammation in the body. In addition to its use in treating leprosy, dapsone is sometimes prescribed for pneumocystis pneumonia in individuals with weakened immune systems, such as those with HIV/AIDS. It is usually taken orally and can be effective in managing various infections and inflammatory diseases.