Piperacillin and Tazobactam for Injection 4.5 Gm USP is a bacterial infection treatment medication. It is useful in treating a variety of bacterial infections, including respiratory tract infections, skin and soft tissue infections, and abdominal infections. This injection, like all antibiotics, must be used correctly to avoid the development of antibiotic resistance. Piperacillin and Tazobactam for Injection 4.5 Gm USP is very much liked and highly appreciated by people, in the market. This is important to use the medication as directed by a healthcare provider.