Dapsone is an antibacterial medicine. It is prescribed for the treatment of two completely different conditions - a disease called leprosy, and a skin condition called dermatitis herpetiformis. It is also prescribed for people with a weakened immune system to protect them from pneumonia caused by an infection with germs (bacteria) called Pneumocystis jirovecii.
This is a companion discussion topic for the original article at https://patient.info/medicine/dapsone-tablets