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Diseases & Conditions

Allergic Reactions

An allergy is your body's immune system overreaction to normally harmless materials in the environment. You can be allergic to certain animals or foods, to drugs or chemicals, to insect stings, or to pollen in the air. The substances that cause allergies are called allergens. Some allergies are so mild that you may not even know that you have one. But rarely some allergic reactions can be so severe that they put your life in danger. When you go into allergic shock, or anaphylaxis, your whole body has a severe reaction to an allergen that affects you.

You are most likely to go into allergic shock after taking a drug or eating something you are allergic to, or after an insect sting. Allergic shock also can happen after skin contact with an allergen, such as latex. Under certain conditions, you can develop allergic shock while exercising.

What to Do

Mild allergic reactions can include sniffling, sneezing, and watery eyes, almost like the symptoms of a cold. You may also develop a mild rash. But when you go into allergic shock, your whole body can be involved. Allergic shock can happen within 15 minutes of exposure to an allergen, so quick action is needed at the earliest sign of symptoms. Call your provider immediately or go to an urgent care center or an emergency room.

Some people with severe allergies carry an EPIPEN, a syringe that injects epinephrine, a medication that makes the reaction less severe. If the person shows symptoms of a severe allergic reaction, use the EPIPEN immediately and call 911.

Self-Care Steps for Allergic Shock

  • Avoid foods, chemicals, drugs, and other substances that have caused allergic reactions.

  • Wear a medical alert bracelet that warns of your allergy and tells what to do in an emergency. Inform your friends and co-workers of your allergies.

  • Tell your doctor and dentist about any medication allergies you have. This includes prescription and over-the-counter medications.

  • Check labels before taking over-the-counter medication or eating foods if you have medication or food allergies.

Decision Guide for Allergic Shock

Symptoms/Signs

Action

Rapid pulse, flushed face or skin, bluish color around lips

 Seek help now

Severe gastrointestinal symptoms, such as vomiting or diarrhea

 Seek help now

Hives

 Seek help now

Extensive facial swelling

   Call 911

Tight feeling in throat that persists or progresses

   Call 911

Trouble speaking or husky voice

 Call 911

Cool, clammy, pale skin

 Seek help now

Persistent coughing and difficulty breathing

 Call 911

Choking or gasping for air

 Call 911

Difficulty swallowing/lump in throat

 Call 911

Swelling of lips, tongue, or throat

 Call 911

Dusky, bluish color of lips or nails

 Call 911

Significant weakness or dizziness

 Call 911

Drowsiness, confusion, or loss of consciousness

 Call 911

Seizures

 Call 911

Chest tightness or wheezing

 Call 911

Publication Source: Well Advised, Second Edition, Text copyright © 2003 Park Nicollet Institute
Online Editor: Sinovic, Dianna
Online Medical Reviewer: Chang, Alice MD
Online Medical Reviewer: Godsey, Cynthia M.S., M.S.N., APRN
Online Medical Reviewer: Lambert, J.G. M.D.
Date Last Reviewed: 1/28/2006
Date Last Modified: 1/31/2006