Which medication class is commonly used to alleviate symptoms of allergic rhinitis?

• A. Beta-blockers
• B. Antihistamines
• C. ACE inhibitors
• D. Diuretics

Answer: (B)

Allergic rhinitis symptoms come from histamine released in the nasal passages when you’re exposed to allergens. Antihistamines block the H1 receptors that histamine normally binds to, so the histamine can’t trigger sneezing, itching, or excess mucus. That direct action on the histamine pathway is why this class is commonly used to relieve the typical symptoms of allergic rhinitis. Second-generation antihistamines are often preferred because they cause less drowsiness while still reducing symptoms. Other drug classes listed don’t target the histamine effects in the nasal mucosa, so they aren’t used to treat allergic rhinitis, though they may be important for other conditions. For more complete relief, antihistamines can be used with intranasal corticosteroids if symptoms are persistent.