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Do any symptoms of a penicillin allergy show up later?

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Though it’s not common, some allergic reactions can happen days or weeks later. Here are the some of the symptoms you would want to look out for:

  • Your joints hurt.
  • You have swelling.
  • You have a rash.
  • You feel like you’re about to throw up.
  • You get very tired.
  • You have a fever.
  • You feel confused.
  • Your heartbeat seems “off.”
  • There’s blood in your pee.

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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What happens during a skin test for penicillin allergy?

WAS THIS ANSWER HELPFUL

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.

    This tool does not provide medical advice. See additional information.

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