Why did my doctor prescribe piperacillin and tazobactam?

The intravenous (IV) antibiotic known as piperacillin and tazobactam (Zosyn) may be prescribed for several different types of infections. You may have been told that you have community-acquired pneumonia: This is a lung infection that you can acquire at work, at school, or at home, rather than one that you get from being in the hospital. You may have been told you have nosocomial pneumonia: This is pneumonia that you get while you are in the hospital. Or, you may have been diagnosed with severe appendicitis. In severe appendicitis, your appendix, which is a small gland in the lower right part of your abdomen, becomes inflamed. It can then rupture, or burst open. Skin infections, infection within your abdomen (peritonitis), and bacteria in the blood (bacteremia) are also reasons that your doctor may have prescribed this medication for you.