Allergic Reactions & Anaphylaxis

Histamine Release
Histamine release causes: 
  • Vasodilation
  • Bronchospasm
  • Contraction of the GI tract
  • Capillaries to become permeable (leaky)
  • Rhinorrhea
  • Watery eyes
  • Urticaria
  • Itching
  • Subsequent vascular collapse

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