The main indications for the action of fexofenadine hydrochloride tablets are: i. Seasonal allergic rhinitis, for the relief of symptoms associated with seasonal allergic rhinitis such as sneezing, runny nose, rhinorrhea and itchy palate and throat, itchy and moist red eyes in adults and children aged 6 years and over. II. Chronic idiopathic urticaria is used to treat the skin symptoms of chronic idiopathic urticaria in adults and children 6 years of age and older, providing significant reduction in the amount of itching and clamminess. Usage and dosage: I. Seasonal allergic rhinitis adults, children 12 years old and above 12 years old, Fexofenadine Hydrochloride Tablets dosage recommendation is 60mg, 2 times a day and 180mg, 1 time a day; renal insufficiency patients recommended starting dose is 60mg, 1 time a day; 6-11 years old children, the recommended dosage of Fexofenadine Hydrochloride is 30mg, 2 times a day; renal insufficiency children Patients with renal insufficiency, the recommended starting dose is 30mg once a day. II. Chronic idiopathic urticaria. Adults, children aged 12 years and above, the recommended dose of fexofenadine hydrochloride is 60mg twice a day; the recommended starting dose for patients with renal insufficiency is 60mg once a day; for children aged 6-11 years, the recommended dose of fexofenadine hydrochloride is 30mg twice a day; the recommended starting dose for pediatric patients with renal insufficiency is 30mg once a day.