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HomeHealth QueryAllergist and Clinical ImmunologistWhat are the 4 types of allergic reactions?...
  • female
  • 30 Years
  • 01/04/2021

Question

What are the 4 types of allergic reactions?

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Answered by 1 Apollo Doctors

Dr. Dr Ranjith Darla

Dr Ranjith Darla

General Practitioner

  • MBBS
  • 3+ Yrs
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Type I or anaphylactic reactions which occur in food/drug allergies, hay fever, allergic rhinitis and asthma. Type II or cytotoxic reactions which occur in mismatched blood transfusion, immune mediated hemolysis or thrombocytopenia. Type III or Immunocomplex reactions which occur in Rheumatoid arthritis , Systemic lupus Erythematosus. Type IV or cell mediated reactions is a delayed hypersensitivity which occur few hours after exposure to any allergens.

Answered 04/07/2025

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