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What are the immediate symptoms of penicillin allergy?

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You could notice some of these signs of an allergy within an hour of taking penicillin:

  • Coughing, wheezing, and shortness of breath
  • Fever
  • Hives (red bumps on your skin that might be itchy)
  • Itchy, watery eyes
  • Itchiness on other parts of your body
  • Runny nose
  • Swelling of your skin, often around your face
  • Tightness in your throat

From: What Is Penicillin Allergy? WebMD Medical Reference

SOURCES:

UpToDate: “Patient information: Allergy to penicillin and related antibiotics (Beyond the Basics).”

American College of Allergy, Asthma & Immunology: “Drug Allergy.”

Mayo Clinic: “Penicillin Allergy.”

American Academy of Allergy, Asthma & Immunology: “Penicillin Allergy FAQ.”

CDC: “Management of Persons Who Have a History of Penicillin Allergy.”

U.S. Department of Veteran Affairs: “Penicillin Skin Testing: Frequently Asked Questions.”

Reviewed by Laura J. Martin on July 9, 2018

SOURCES:

UpToDate: “Patient information: Allergy to penicillin and related antibiotics (Beyond the Basics).”

American College of Allergy, Asthma & Immunology: “Drug Allergy.”

Mayo Clinic: “Penicillin Allergy.”

American Academy of Allergy, Asthma & Immunology: “Penicillin Allergy FAQ.”

CDC: “Management of Persons Who Have a History of Penicillin Allergy.”

U.S. Department of Veteran Affairs: “Penicillin Skin Testing: Frequently Asked Questions.”

Reviewed by Laura J. Martin on July 9, 2018

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When should I call 911 about my penicillin allergy?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

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