POLYCILLIN vs PRINCIPEN '500'
Independent side-by-side comparison.
Frequently asked questions
What is the difference between Polycillin and Principen '500'?
Both Polycillin and Principen '500' share the active ingredient Ampicillin/Ampicillin Trihydrate.
Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.