Epinastine is a second-generation antihistamine primarily used for the treatment of allergic conditions, including allergic conjunctivitis and rhinitis. It works by selectively blocking H1 histamine receptors, reducing symptoms such as itching, redness, and swelling. Epinastine was first developed in the 1980s and introduced in the 1990s as an eye-drop formulation, offering rapid relief with minimal systemic side effects compared to first-generation antihistamines. Over time, it has become a widely used therapy for managing ocular allergies due to its effectiveness and safety profile.
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