What is a typical first-line treatment for allergic conjunctivitis that also stabilizes mast cells?

• A. Antihistamine-mast cell stabilizers such as olopatadine.
• B. Corticosteroid drops.
• C. Antibiotic drops.
• D. Beta-blocker drops.

Answer: (A)

In allergic conjunctivitis the goal is to both block the effect of histamine and prevent mast cell degranulation, reducing itching, redness, and tearing. A dual-action topical agent that does this—antihistamine plus mast cell stabilization—is a natural first-line choice. Olopatadine fits this perfectly: it blocks histamine H1 receptors to diminish itching and ocular symptoms, and it stabilizes mast cell membranes to prevent release of histamine and other mediators on allergen exposure. This combination provides rapid relief and ongoing control with a convenient dosing pattern, and it generally has a favorable safety profile compared with steroids. Antibiotic drops aren’t indicated unless there’s a bacterial infection, and beta-blocker drops aren’t used for allergy.