What is the brand name for ampicillin?

Ampicillin is an antibiotic that belongs to the penicillin class of medications. The brand name for ampicillin is Principen. This name is recognized in various medical and pharmacological references, indicating that it is the proprietary title under which ampicillin is marketed.

Augmentin is a combination antibiotic that contains amoxicillin (a derivative of penicillin) and clavulanate potassium, while Amoxil is solely amoxicillin. Zosyn is another combination antibiotic that includes piperacillin (a penicillin-related antibiotic) and tazobactam. These distinctions clarify why Principen is the correct brand name for ampicillin.