Allergic reaction
About Allergic reaction
An abnormal response of the immune system of the body to some type of foreign substance. The substance that triggers the allergic reaction is called an allergen. Initial contact with the allergen does not produce any symptoms. However, with time the immune system begins to form antibodies to the allergen, and future interactions with the allergen trigger more dramatic responses. The response to these sensitizing allergens varies from sneezing to respiratory difficulty, shock, and deathSymptoms
Hives, other rashes, itching, swelling, mouth swelling, throat swelling, sneezing, wheezing, shortness of breath, dizziness or fainting from low blood pressure.Tests & Diagnostics
A history and physical exam will be performed. Allergy testing may be done to determine the allergen causing the reaction.OTC sleep aids and supportive treatments
Prescription medications
Conventional treatment summary
Therapy depends on the severity of the symptoms. Treatment includes: antihistamines (diphenhydramine/Benadryl), steroids, histamine 2 blockers (cimetidine/Tagamet, ranitidine/Zantac), epinephrine, intravenous fluids, and/or oxygen. One must avoid the cause of the reaction.Medical specialties
Internal Medicine · Pediatrics · Allergy and Immunology · Pediatric Allergy and Immunology
This page is educational content, not medical advice. Always consult a qualified clinician for diagnosis and treatment of Allergic reaction.