Allegra 120 is a widely used antihistamine medication that contains fexofenadine hydrochloride, primarily prescribed to relieve symptoms associated with seasonal allergic rhinitis—commonly referred to as hay fever—and sometimes chronic idiopathic urticaria (hives). This includes bothersome symptoms like sneezing, runny or itchy nose, red or watery eyes, and itching of the throat or skin. What makes Allegra 120 particularly effective is its non-drowsy formula, as fexofenadine is a second-generation antihistamine that does not easily cross the blood-brain barrier, significantly reducing the risk of sedation—a common issue with older antihistamines.