Mupirocin is an antibiotic medication used to treat skin infections caused by bacteria. It works by stopping the growth of bacteria and preventing the spread of infection. Mupirocin is commonly used to treat impetigo, a contagious skin infection, as well as other types of skin infections such as folliculitis and furunculosis. It is usually applied topically to the affected area and is available in the form of ointment or cream. Mupirocin is generally well-tolerated and has a low risk of side effects. However, it is important to follow the prescribed dosage and duration of treatment to ensure its effectiveness.