Antibiotic testing is performed at the office once to twice a year. We can test for antibiotic allergies to the Penicillin family (i.e. amoxicillin, Augmentin) and the Cephalosporin family (i.e. Keflex (cephalexin), Omnicef (cefdinir), ceftriaxone). There are TWO days of testing involved in completing the antibiotic testing. Therefore, it is very important that you are able to commit to BOTH dates. It is a two week process that involves two testings, two weeks apart, and an oral challenge of the medication in question at home in between the testing. There will be 10 scratches placed on one arm first. After waiting 15-20 minutes our nurse will evaluate if there is a reaction (hive). Based on these results, intradermal injections of the antibiotics are done in the opposite arm. The interdermal test is then read by the nurse 15-20 minutes later and Dr. Pichichero will come in and go over the results and suggestions with you.
Check out this article written by Dr. Pichichero regarding the safety of using cephalosporins even if penicillin allergic.