My fiance went the the dentist a few months ago for an abscessed tooth, and was given a prescription for a penicillin alternative due to a SEVERE allergy. The pharmacist just called us today saying the drug company had called saying they had mixed up the penicillin supply with the Cephalosporin supply. He had gotten very sick while taking the medication at the time and was advised by his doctor to stop taking it - he had fever & chills, severe vomiting (to the point that it tore his stomach lining), headaches, and other flu like symptoms. Should we be worried about any effects that he could have on going because of this mix up? And is there anything we can do?