Erythromycins are a type of antibiotic that is commonly used to treat various bacterial infections, including respiratory tract infections, skin infections, and sexually transmitted diseases. There are several synonyms for erythromycins, including azithromycin, clarithromycin, and roxithromycin. These antibiotics work by stopping the growth of bacteria, which helps the body fight off the infection. In some cases, erythromycins can also be used to prevent infections in people who are at risk of contracting them, such as people with weakened immune systems. It is important to use these antibiotics as prescribed by a doctor and to complete the full course of treatment to ensure that the infection is fully treated.