Since 2022, we have helped patients who think they have a penicillin allergy. Our goal is to confirm if you truly have an allergy or if you can safely take penicillin. So far, 97% of the patients we have tested have found out they were NOT truly allergic. This means they can safely use penicillin again.

How it Works

We look at your health history and ask questions to figure out if your allergy risk is low or high. Then we do the testing.

You do not need a referral from another doctor to schedule an appointment.

Having a false penicillin allergy label can be a big problem. De-labeling can help you:

• Get Better Medicine: Penicillin is often the best and safest medicine for many common sicknesses. When you are labeled as allergic, doctors must use stronger and sometimes more dangerous antibiotics instead.
• Save Money: Penicillin is often less expensive than other antibiotics.
• Get Home Faster: Patients with a false allergy sometimes have to spend more time in the hospital.
• It's Very Safe: The chance of a serious reaction during testing, like anaphylaxis, is extremely low.

Before Your Appointment

Call us directly to schedule—no referral needed. You don't need to do any special preparation beforehand.

During Your Appointment

We will review your brief health history and fill out a penicillin allergy questionnaire. The testing process depends on whether your risk is low or high:

Low-Risk Patients: You will be given a small amount of amoxicillin (a type of penicillin) by mouth and watched closely for a short time.

High-Risk Patients: You will have three steps of testing:

• Skin Prick Test (Percutaneous Testing)
• Skin Injection Test (Intracutaneous Injection)
• Oral Challenge (Taking the medicine by mouth)

After Your Appointment

We will tell you right away if you are positive (still allergic) or negative (no allergy). The results will be updated in your electronic health record (MyChart). Then, a letter with the results will be sent to your main doctor and your pharmacy.

We are leaders in this field. Children's Wisconsin is one of the only places in the region that offers this specialized, safe, and structured de-labeling process for both children and adults.

Our team has specific training and experience in allergy testing for the developing brains and bodies of kids and teens. We follow the safest and newest guidelines to make sure you or your child is protected every step of the way.