Complex sentence: Ampicillin/sulbactam is also used when the cause of an infection is not known (empiric therapy), such as intra-abdominal infections, skin infections, pneumonia, and gynecologic infections.
Split into simpler sentences: Ampicillin/sulbactam is also used when the cause of an infection is not known (empiric therapy). Intra-abdominal infections, skin infections, pneumonia, and gynecologic infections.