It isn't clear why some people develop penicillin allergy while others don't. Prevention focuses on awareness. Treating an allergic reaction may require taking medications or, in the case of a serious reaction, emergency care. Allergic responses occurring with a penicillin allergy range from annoying rashes to life-threatening reactions, such as difficulty breathing.
Common signs and symptoms of penicillin allergy include:
- Itchy eyes
- Swollen lips, tongue or face
It isn't clear why some people develop allergies while others don't.