Hi, and a 44 year old women with a question about immunology. I used to have allergies to just about everything - penicillin, ampicillin, amoxicillin, celcor, sulfa drugs, all cephalosporins, all OTC topical antibiotic ointments, cats, dogs, pollens, molds dusts, perfumes, detergents, etc. I had terrible eczema and chronic general itchiness and I reacted very badly to some antibiotics.