Erythromycin is an antibiotic medication that is generally used to treat infections caused by bacteria. It belongs to a group of drugs known as macrolides. It is sometimes prescribed to treat skin infections, ear infections, respiratory tract infections, and sexually transmitted diseases. However, if you are allergic to erythromycin, there are other similar medications you can use. These include azithromycin, clarithromycin, and roxithromycin. These medications also come in the form of tablets, capsules, and liquids, and they work by stopping bacteria from growing and multiplying. It is important to always consult your healthcare provider before taking any medication to ensure that you are getting the right treatment for your condition.