Final answer:
The effective drug for treating anaphylaxis is epinephrine, often administered through an EpiPen for immediate action. It raises blood pressure and relaxes bronchial muscles to counteract life-threatening allergic reactions.
Step-by-step explanation:
An effective drug for treating anaphylaxis is epinephrine. Anaphylaxis is a severe and potentially life-threatening allergic reaction that can cause symptoms such as a drop in blood pressure, difficulty breathing, and swelling of the tongue and throat. Epinephrine is administered because it can raise blood pressure, relax bronchial smooth muscles, and control immune reactions. It is often provided to individuals at risk for anaphylactic reactions in the form of an epinephrine auto-injector, commonly known as an EpiPen®, which allows for quick self-administration in an emergency. Following the immediate administration of epinephrine, additional treatments such as antihistamines and slow-acting corticosteroids may be given.