A peanut allergy occurs when the body responds abnormally to peanuts. The reaction may range from mild to life-threatening. Even a very small amount of peanuts can lead to a serious reaction. Peanut allergy is seen especially in children.
This condition may be serious. It requires care from a doctor.
The allergy occurs when your body is exposed to peanut proteins. The body mistakes the proteins as harmful substances, and the immune system releases chemicals into the bloodstream, which causes symptoms .
Coming in contact with peanuts can occur by:
Risk factors include:
Symptoms may include:
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Symptoms that may be a sign of a very serious allergic reaction ( anaphylaxis ) may include:
If you have a serious allergic reaction or are with someone who does, call 911 right away or go directly to the hospital’s emergency room.
You may be referred to a doctor who specializes in allergies. The doctor will:
Tests may include:
The doctor may ask you to keep a food diary. This means you will write down your experiences with food, such as your eating habits and symptoms. This may help the doctor figure out what food(s) may be causing your allergies.
The doctor may put you on an elimination diet to figure out which foods may be triggering an allergic reaction. If your doctor thinks you might be allergic to peanuts, she may ask you to remove peanuts from your diet for 1-2 weeks then add them back to your diet to see if you experience any symptoms. The elimination diet is only done under a doctor’s supervision.
Talk with your doctor about the best treatment plan for you. Options include:
The best treatment is to avoid peanuts, foods containing them, and foods that may have been exposed to them. Always read ingredient labels. Even if you do not think the food contains peanuts, still check the label! Most food labels will state whether the factory where a food was made also processes peanuts. If offered homemade foods, always ask about the ingredients to check for the presence of peanuts or peanut oil.
If you do have a mild allergic reaction, you may be able to take antihistamines to reduce symptoms, like itching or hives. Talk with your doctor about medicines that are right for you.
For severe allergic reactions, you may need to inject yourself with a medicine called epinephrine . Epinephrine is injected using an auto-injector (eg, EpiPen, Twinject), which contains a syringe, needle, and a dose of the medicine. You inject the medicine into your thigh. It is a good idea to carry an auto-injector at all times.
For any severe reaction, call 911 or go to the emergency room right away.
Although you cannot prevent a peanut allergy, you can help prevent a reaction. To help reduce your chance of a reaction, take these steps:
Here are some foods that may contain peanuts or may have been made in factories that process peanuts:
The list may be endless. This is why it is very important to be aware of what you are eating or come in contact with. Even the smallest amount of peanut protein can trigger a life-threatening response.
American Academy of Allergy, Asthma, and Immunology
Food Allergy and Anaphylaxis Network
Allergy Asthma Information Association
Calgary Allergy Network
Lee CW, Sheffer AL. Peanut allergy. Allergy Asthma Proc. 2003;24(4):259-264.
Mayo Clinic Staff. Peanut allergy. Mayo Clinic website. Available at: http://www.mayoclinic.com/health/peanut-allergy/DS00710 . Updated August 23, 2010. Accessed August 24, 2011.
Nut and peanut allergy. KidsHealth website. Available at: http://kidshealth.org/kid/stay_healthy/food/nut_allergy.html# . Updated August 2008. Accessed August 24, 2011.
Peanut allergy. American College of Allergy, Asthma, and Immunology website. Available at: http://www.acaai.org/allergist/allergies/Types/food-allergies/types/Pages/peanut-allergy.aspx . Accessed August 24, 2011.
Peanut allergy. Asthma and Allergy Foundation of America website. Available at: http://www.aafa.org/display.cfm?id=9&sub=20&cont=517 . Updated 2005. Accessed August 24, 2011.
Peanut allergy. The Food Allergy and Anaphylaxis Network website. Available at: http://www.foodallergy.org/page/peanut-allergy . Updated August 18, 2011. Accessed August 24, 2011.
Last reviewed September 2012 by Purvee S. Shah, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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