174. A patient with an acute allergic reaction (anaphylaxis) is administered epinephrine. From a medicinal perspective, what is the technical primary pathophysiological mechanism of epinephrine in anaphylaxis?

  • Antihistamine effect.
  • Vasoconstriction, bronchodilation, and decreased mediator release from mast cells.
  • Corticosteroid effect.
  • Direct mast cell stabilization.
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