DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Penicillin allergy. A red rash on the skin of a patient's hand, caused by an allergy to the common antibiotic drug penicillin. Penicillin is used to treat infections caused by a wide variety of bacteria. There are few serious side-effects, but some patients develop allergic reactions such as skin rashes, swelling of the throat and fever. People allergic to penicillin are also allergic to chemically similar antibiotics, such as ampicillin and cloxacillin.
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