Which statement correctly differentiates an allergic reaction from anaphylaxis?

Which statement correctly differentiates an allergic reaction from anaphylaxis?

• A. Anaphylaxis is a severe systemic reaction with massive histamine release; an allergic reaction can be local or mild
• B. An allergic reaction is always life-threatening
• C. Anaphylaxis is a mild skin irritation
• D. All allergic reactions require hospitalization

Answer: (A)

The difference between an allergic reaction and anaphylaxis is in how widespread and how severe the reaction is. Allergic reactions can be limited to the skin or mucous membranes, presenting as itching, hives, or localized swelling, and are often mild. Anaphylaxis is a severe, life-threatening systemic reaction that starts quickly and affects multiple body systems, potentially causing airway swelling or constriction, trouble breathing, wheezing, dizziness or fainting, and low blood pressure. This makes anaphylaxis a medical emergency requiring immediate treatment with epinephrine and urgent care. The statement is correct because it cleanly contrasts the potential local or mild nature of many allergic reactions with the high risk and systemic involvement seen in anaphylaxis. The other options mischaracterize the risk or scope of these reactions.

The difference between an allergic reaction and anaphylaxis is in how widespread and how severe the reaction is. Allergic reactions can be limited to the skin or mucous membranes, presenting as itching, hives, or localized swelling, and are often mild. Anaphylaxis is a severe, life-threatening systemic reaction that starts quickly and affects multiple body systems, potentially causing airway swelling or constriction, trouble breathing, wheezing, dizziness or fainting, and low blood pressure. This makes anaphylaxis a medical emergency requiring immediate treatment with epinephrine and urgent care. The statement is correct because it cleanly contrasts the potential local or mild nature of many allergic reactions with the high risk and systemic involvement seen in anaphylaxis. The other options mischaracterize the risk or scope of these reactions.