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Antibiotic Medication Allergy

Medically reviewed by Drugs.com. Last updated on Mar 3, 2024.

What is an antibiotic medication allergy?

An antibiotic medication allergy is a harmful reaction to an antibiotic. The reaction can start soon after you take the medicine, or days or weeks after you stop. Healthcare providers cannot know ahead of time if you will have an allergic reaction. Your immune system may become sensitive to the antibiotic the first time you take it. You may have an allergic reaction the next time. The antibiotics most likely to cause an allergic reaction are penicillins and cephalosporins.

What are the signs and symptoms of an allergic reaction to an antibiotic?

What increases my risk for an antibiotic medication allergy?

How is an antibiotic medication allergy diagnosed?

Your healthcare provider will ask about your medical history and allergies. You may need additional testing if you developed anaphylaxis after you were exposed to a trigger and then exercised. This is called exercise-induced anaphylaxis. You may also need any of the following:

How is an allergic reaction to an antibiotic treated?

What steps do I need to take for signs or symptoms of anaphylaxis?

What safety precautions do I need to take if I am at risk for anaphylaxis?

Call 911 for signs or symptoms of anaphylaxis,

such as trouble breathing, swelling in your mouth or throat, or wheezing. You may also have itching, a rash, hives, or feel like you are going to faint.

When should I seek immediate care?

When should I contact my healthcare provider?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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