Linezolid 600 mg is an antibiotic used to treat certain serious bacterial infections in many different parts of the body, including certain types of skin infections or pneumonia. It belongs to a class of antibiotics called oxazolidinones, which work by stopping the growth of bacteria. Linezolid treats only bacterial infections and will not work for viral infections such as the common cold or flu. The medication is available in tablet and oral suspension forms, and the dosage and length of treatment depend on the type of infection and the patients age and weight. It is usually taken with or without food twice a day (every 12 hours) for 10 to 28 days. It is important to take linezolid exactly as directed by the doctor and to complete the full course of treatment, even if the symptoms improve after a few days.