Anaphylactoid reactions (pseudo allergic reaction)
About Anaphylactoid reactions (pseudo allergic reaction)
Not a true allergic reaction. Anaphylactoid reactions are caused by the release of histamine and can result in a spectrum of symptoms from a rash to life threatening anaphylaxis. Intravenous contrast dye and nonsteroidal anti-inflammatory drugs such as ibuprofen are two well-described causes.Symptoms
Rash, itching, throat swelling, facial swelling, wheezing, shortness of breath, dizziness or fainting from low blood pressure.Tests & Diagnostics
A history and physical exam will be performed to determine the offending agent.Common tests: X-ray.
OTC sleep aids and supportive treatments
Prescription medications
Conventional treatment summary
Treatment includes: antihistamines (diphenhydramine/Benadryl), histamine 2 blockers (cimetidine/Tagamet, ranitidine/Zantac), steroids, epinephrine, and intravenous fluids.Medical specialties
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 Anaphylactoid reactions (pseudo allergic reaction).