Ilosone is a brand name for erythromycin, an antibiotic used to treat a wide range of bacterial infections. There are a few different synonyms for Ilosone, including erycin, erythromycin, and erythrocot. Each of these names refers to the same active ingredient, which works by inhibiting the growth of bacteria and helping the body to fight off the infection. Ilosone is often prescribed for respiratory infections, skin infections, and sexually transmitted diseases, among others. While it is generally safe and effective when used as directed by a healthcare professional, patients should always be sure to follow their doctor's instructions and report any potential side effects or complications.