Type of Reactions | Hypersensitivity | Mediated by | Time of Onset | Examples |
---|---|---|---|---|
IgE-mediated | Type I | IgE antibodies | Within 1 hour | Anaphylaxis |
Non-IgE-mediated | Type II | Cytotoxic | Hours to days | Hemolytic anemia |
Non-IgE-mediated | Type III | Immune complex | 7-21 days | Serum sickness |
Non-IgE-mediated | Type IV | Cell-mediated | Days to weeks | Maculopapular rash Stevens-Johnson syndrome Toxic epidermal necrolysis |
IgE = immunoglobulin E |
Source:
- Gonzalez-Estrada A, Radojicic C. Penicillin allergy: A practical guide for clinicians. Cleve Clin J Med. 2015;82:295-300. [PubMed Abstract]