I had minor surgery a while back and, within a couple of months, I became allergic to several foods. I went in for testing and the tests indicated a long list of allergies. I ve never been allergic to any foods in the past. Is it possible that the drugs I was given during (or before/after) surgery triggered these changes? Drugs include: Demerol, Ancef, Decadron, Zofran, Lidocaine, Epinephrine and Sodium Bicarbonate. I m a petite senior lady. Thanks for any information you may elect to provide.