Immediate treatment of anaphylaxis is?

Appeared in: NCL (MP) Nursing Officer - 2019

Explanation

Adrenaline is the essential first-line drug for anaphylaxis due to its rapid onset of action.
It acts on alpha-1 receptors to cause vasoconstriction, which reverses hypotension and reduces swelling (angioedema).
It acts on beta-2 receptors to cause bronchodilation, which relieves wheezing and difficulty breathing.
No other medication provides this combination of immediate, life-saving effects.

Option B: Benzyl penicillin is an antibiotic that is a common trigger (cause) of anaphylaxis in allergic individuals; it is not a treatment.
Option C: Hydrocortisone is a corticosteroid with a slow onset of action (hours). It is used as a second-line agent to reduce inflammation and prevent a biphasic (late-phase) reaction, not for immediate life-saving.
Option D: Atropine is an anticholinergic drug used to treat symptomatic bradycardia (slow heart rate). It does not address the primary problems of vasodilation and bronchoconstriction in anaphylaxis.

Clinical Relevance

Nursing practice connection: Knowing First-line management of anaphylaxis helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Prompt recognition of anaphylaxis and immediate administration of adrenaline are critical nursing responsibilities that directly impact patient survival.
Nurses must be proficient in the ABCs of resuscitation, including managing the airway, administering high-flow oxygen, and establishing large-bore IV access for rapid fluid administration.
All patients treated for anaphylaxis must be observed for several hours (typically 4-12) due to the risk of a biphasic reaction, where symptoms recur without re-exposure to the trigger.

How to Approach the Question

First, identify the core clinical problem: anaphylaxis, which is a life-threatening emergency.
Note the keyword 'immediate' in the question stem. This directs you to find the first-line, most critical, life-saving intervention.
Recall the pathophysiology of anaphylaxis: widespread vasodilation leading to shock and bronchoconstriction leading to respiratory failure.
Evaluate each option's mechanism and speed of action in relation to this pathophysiology.
Adrenaline is the only drug that rapidly reverses both vasodilation and bronchoconstriction.
Eliminate the other options: Benzyl penicillin is a cause, not a treatment. Hydrocortisone is a second-line agent with a slow onset. Atropine is for a different condition (bradycardia).

Concept Tested & Keywords

QSZY8JbQqXpcjmuBcd56Pe

E6 Medicine Davidson Principles Practice 24e p. 96-98

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1451-1453

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