Linezolid is an antibiotic used to treat certain serious bacterial infections. It belongs to a class of medications known as oxazolidinones and works by inhibiting bacterial protein synthesis, which helps stop the growth of bacteria. It is effective against a variety of Gram-positive bacteria, including Staphylococcus aureus and Streptococcus pneumoniae. This medication is often prescribed for infections that are resistant to other antibiotics, such as vancomycin-resistant Enterococcus (VRE) and complicated skin infections. Linezolid can be administered orally or intravenously, making it versatile for different patient needs. However, it may cause side effects, including nausea and headache, and requires monitoring for potential interactions with other medications.