Used primarily as an antihistamine in the treatment of allergic conditions such as seasonal allergic rhinitis and chronic idiopathic urticaria. It helps relieve symptoms like sneezing, runny nose, itchy eyes, and skin rashes by selectively blocking histamine H1 receptors. Known for its rapid onset of action and long duration, it is typically administered orally in tablet form. It has minimal sedative effects compared to older antihistamines due to limited penetration into the central nervous system.