Linezolid medication is a synthetic antibiotic that is used to treat infections caused by Gram-positive bacteria. Linezolid use is vital in the treatment of serious bacterial infections. Linezolid comes in different forms like injection, tablets, and oral suspension. Take this medicine by mouth, usually every 12 hours, with or without food. Linezolid oral suspension is advised by a doctor for children. The injection is given in combination with other drugs. The dosage is based upon your weight, medical condition, and response to treatment.