What action does epinephrine perform during anaphylaxis?

During anaphylaxis, epinephrine plays a crucial role in counteracting the severe allergic response. It causes peripheral vasoconstriction, which helps to increase blood pressure by tightening blood vessels and improving blood flow to vital organs. Additionally, epinephrine promotes bronchodilation, relaxing the muscles in the airways and allowing for easier breathing. This combination of effects is vital during anaphylaxis, where cardiovascular collapse and respiratory distress are significant concerns.

When administered, epinephrine rapidly reverses the symptoms of anaphylaxis, providing vital support and improving chances of recovery. Its dual action of vasoconstriction and bronchodilation makes it an essential emergency medication in such critical situations.