Acute allergic reaction

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Background

  • Similar to Anaphylaxis but does not meet all the requirements (i.e. just skin manifestations)

Clinical Presentation

Raised urticaria

Workup

  • Clinial

Differential Diagnosis

Acute allergic reaction

Treatment

  1. Antihistamines for pruritis
  2. Ranitidine has been found to improve urticaria but not angioedema at 2 hours[1])
  3. Corticosteroids are of questionable efficacy
  4. Rule out Anaphylaxis
  5. Difficult to differentiate from Angioedema

Disposition

See Also

  1. Lin, RY et al. Improved Outcomes in Patients With Acute Allergic Syndromes Who Are Treated With Combined H1 and H2 Antagonists. Annals of Emergency Medicine. 36:5 NOVEMBER 2000.