Erythromycin is widely used as an antibiotic to treat various bacterial infections. It is effective against respiratory tract infections, such as bronchitis and pneumonia, as well as skin infections like acne and cellulitis. It is also used for treating sexually transmitted infections, including chlamydia and syphilis. In some cases, it is prescribed to prevent infections before dental or surgical procedures in patients allergic to penicillin. Additionally, erythromycin is utilized in veterinary medicine to treat bacterial infections in animals. Its application extends to ophthalmic formulations for eye infections and topical creams for skin conditions.