Peniscillian allergy, what to do?

Several Things: First, learn to spell it right so everyone knows what you are talking about. It is penicillin. Second get an allergist to test you to confirm that you are really allergic to penicillin. Third, if you really are allergic avoid all drugs with penicillin or it's cousins, like amoxicillin, ampicillin, and often first and second generation cephalosporins like keflex or ceclor.