Ampicillin Sulbactam (Amsumed) 500mg/250mg Powder for Injection, IM/IV, Vial 1's is a combination antibiotic used to treat a variety of bacterial infections, including respiratory tract infections, urinary tract infections, skin and soft tissue infections, and intra-abdominal infections. Ampicillin inhibits bacterial cell wall synthesis, while Sulbactam enhances its effect by inhibiting beta-lactamase enzymes produced by resistant bacteria. It is administered via intramuscular (IM) or intravenous (IV) injection, as directed by a healthcare professional.