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The most common cause of drug allergies are penicillin antibiotics. A penicillin allergy provokes an allergic reaction that occurs when your body’s immune system overreacts to penicillin antibiotics.

Symptoms of penicillin allergy

Common adverse drug reactions and the use of the penicillins include: diarrhea, hypersensitivity, nausea, rash, neurotoxicity urticaria. Infrequent adverse effects include fever, vomiting, erythema, dermatitis, angioedema, seizures.

An allergy to penicillin can cause an anaphylactic reaction, which can be deadly.
You may control your symptoms of penicillin allergy with antihistamines that you can buy without a prescription.

If you have an allergic reaction to penicillin you should receive another antibiotic therapy. In this type of therapy, you start taking small amounts of the penicillin and gradually increase how much you take.