What is a key medication class used to relieve symptoms in allergic rhinitis?

Antihistamines are a key medication class used to relieve symptoms in allergic rhinitis because they work by blocking the action of histamine, a substance in the body that plays a significant role in allergic reactions. When an allergen, such as pollen or dust mites, is encountered, the body releases histamines, which can lead to symptoms such as sneezing, nasal congestion, runny nose, and itchy eyes. By inhibiting histamine's effects, antihistamines help alleviate these symptoms, making them a first-line treatment for allergic rhinitis.

Other medication classes mentioned do not directly address the symptoms of allergic rhinitis. For instance, bronchodilators are primarily used to treat airway constriction in conditions like asthma, while cholinergics mainly influence nerve impulses and are not typically used for allergies. Beta-blockers are used for managing cardiovascular issues and certain types of anxiety, but they do not play a role in treating the symptoms of allergies. Thus, antihistamines are specifically indicated for managing allergic rhinitis symptoms effectively.