RELESTAT, also known by its generic name epinastine, is an antihistamine eye drop medication primarily used to prevent and treat eye symptoms such as itching, redness, and watering that are associated with allergic conjunctivitis. It works by blocking the action of histamine, a substance in the body that causes allergic symptoms. RELESTAT is often prescribed because it can provide quick relief from the discomfort caused by eye allergies and is suitable for use in adults and children. Its effectiveness and minimal systemic absorption make it a preferred choice for individuals seeking targeted relief from ocular allergies without many of the side effects associated with oral antihistamines.