Linezolid is an antibiotic used to treat certain serious bacterial infections, particularly those caused by Gram-positive bacteria. It is effective against infections like pneumonia, skin infections, and infections caused by methicillin-resistant Staphylococcus aureus (MRSA). Linezolid works by inhibiting bacterial protein synthesis, which helps stop the growth of bacteria. This medication is available in both oral and intravenous forms, making it versatile for different patient needs. However, it can have side effects, including nausea, diarrhea, and potential interactions with certain medications, particularly those affecting serotonin levels. Regular monitoring is recommended during treatment.