Fexofenadine is commonly used as an antihistamine to relieve allergy symptoms such as sneezing, runny nose, itchy or watery eyes, and itching of the throat or nose. It is effective in managing seasonal allergies, including hay fever, and chronic urticaria (hives). The medication works by blocking the action of histamine, a substance in the body that causes allergic symptoms. It is often preferred due to its non-sedating properties, making it suitable for daytime use without causing drowsiness. This high-purity form (≥95%) is suitable for use as a pharmaceutical reference standard, analytical reagent, or intermediate in research and development.