Erythromycin is an antibiotic that is used to treat infections such as infections of the chest, mouth, skin, stomach and genitals. It works by killing or stopping the growth of bacteria (bugs). It is often used for people who are allergic to penicillins. Like all antibiotics, erythromycin is not effective against infections caused by viruses.
In New Zealand, erythromycin is available as tablets (400 mg, 250 mg and 500 mg) and liquid and can be given as an injection in the hospital.