Mupirocin ointment is a topical medication used to treat skin infections, such as impetigo, according to MedicineNet. The medication is an antibiotic that stops the growth of bacteria in the skin, stopping the infection. Mupirocin ointment is a prescription medication.
MedicineNet states that mupirocin ointment is typically applied three times a day, directly onto the cleaned and dried infected area. Muprocin ointment is also used to treat MRSA and staph infections. There is a nasal spray version of the antibiotic as well, which is used to treat those that have some contact with patients infected with MRSA or other infectious diseases.