Oxazolidinones are a class of synthetic antibiotics used primarily to treat infections caused by Gram-positive bacteria, including those resistant to other antibiotics. They work by inhibiting protein synthesis in bacteria, effectively stopping their growth and reproduction. One of the most well-known oxazolidinones is linezolid, which is often prescribed for serious infections like pneumonia and skin infections. These antibiotics are typically reserved for cases where other treatments have failed, due to concerns about resistance and side effects.