American Heart Association First Aid Practice Test 2025 – The Comprehensive All-in-One Guide for Exam Success!

In the case of a severe allergic reaction, known as anaphylaxis, an epinephrine auto-injector is the critical medication to use. Anaphylaxis can occur rapidly and can be life-threatening, requiring immediate intervention. Epinephrine works by constricting blood vessels, which increases blood pressure, and by relaxing the muscles in the airways, making it easier to breathe. It also counteracts swelling and hives, which are common symptoms of severe allergic reactions.

Prompt administration of epinephrine can significantly reduce the risk of further complications and is typically the first line of treatment in emergency situations involving severe allergic responses. While antihistamines are often used for milder allergic reactions, they do not act quickly enough to address the life-threatening symptoms of anaphylaxis. Similarly, medications like aspirin and ibuprofen are not appropriate treatments for allergic reactions, as they may not have the desired effect on the specific physiological responses involved in anaphylaxis.