Question

which of the following medications treats an allergy attack? a expectorant b bronchodilator c antitussive d antihistamine

Explanation:

Antihistamines work by blocking histamine, a chemical released during an allergy attack that causes symptoms like itching, sneezing, and runny nose. Expectorants help with mucus - thinning, bronchodilators open the airways mainly for conditions like asthma not directly for allergy symptoms, and antitussives are for suppressing coughs.

Answer:

D. antihistamine