Penicillin allergies are usually diagnosed during childhood when penicillin or a derivative is used to treat a common infection. After the antibiotic is given, side effects such as rash, hives, nausea, or vomiting may be mistaken as an allergic reaction.

Although some people do have penicillin allergy and should never take it or its derivatives, 9 out of 10 people who have been told they have a penicillin allergy aren’t allergic. For those who are allergic, 90% may have the allergy cleared within 5 years of diagnosis.

Why should you be tested?

Many people have been mistakenly told they have a penicillin allergy. It’s important for you and your health care team to know if there is a true allergy because:

  • Penicillin and its derivatives are the best treatment course for many illnesses
  • It is a cost-effective antibiotic which can treat many bacterial infections
  • If your health care provider prescribes a penicillin alternative, it can contribute to drug resistance, making antibiotics less effective in the future

Interested in a penicillin allergy test/challenge?

During the 2 to 3 hour challenge in a specialty suite, you will be closely monitored by your medical provider along with another care team member. Our staff and facility are equipped with state-of-the art technology and training to provide the penicillin challenge in a safe, comfortable environment.

Please talk to your provider today to review your health history, the benefits, and if you’re a candidate for a penicillin challenge.

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Success Stories

Allergy Associates of La Crosse literally changed my life. Before discovering Allergy Associates through a friend, I had a long history of severe and multiple food, drug, and environmental allergies and asthma, which had never been successfully managed by other renowned allergy specialists. My lengthy history includes a medical discharge from the U.S. Air Force,…
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