Which medication type is often used to treat seasonal allergic conjunctivitis?

Antihistamines are commonly used to treat seasonal allergic conjunctivitis because they work by blocking histamine receptors in the body. Histamine is a chemical released during allergic reactions that causes symptoms such as itching, redness, and swelling in the conjunctiva. Through their action, antihistamines effectively relieve these symptoms, making them a primary choice for managing the discomfort associated with seasonal allergies.

Antihistamines in ophthalmic formulations provide localized relief with fewer systemic side effects, as they directly address the allergic response occurring in the eyes. Additionally, many antihistamines also possess mast cell stabilizing properties, which further helps to prevent the release of histamine during subsequent exposure to allergens, thus providing ongoing relief.

In contrast, mydriatics are used to dilate the pupil and are not indicated for treating allergic reactions. Antivirals are designed to treat viral infections and have no impact on allergic processes. Topical NSAIDs, while useful for managing inflammation and pain, are not specifically targeted for the allergic response seen in conjunctivitis. This makes antihistamines the most appropriate choice for addressing seasonal allergic conjunctivitis.