These are good questions for your pharmacist. However, I do know that you should have no problem taking penicillin with Klonopin. There are many classes of antibiotics and the only type that I know of that can be a problem with Klonopin are the macrolide antibiotics like azithromycin, biaxin, clarythromycin, or erythromycin.

Penicillins are, well... penicillins(!) not macrolides, and should pose no problem with Klonopin absorption.

zuzu xx