Xithromax, also known as Astemizole tablets, is a second-generation antihistamine H1 receptor antagonist. It is mainly used for treating allergic diseases and relieving symptoms caused by allergic diseases, for example, it can treat symptoms such as sneezing, nasal itching and nasal congestion caused by allergic rhinitis; it can treat symptoms such as itchy eyes and watery eyes caused by allergic conjunctivitis; it can treat wind clusters and itching caused by acute and chronic urticaria; it can also be used to treat other diseases related to allergy, such as eczema, insect bite dermatitis and solar dermatitis. In addition, it can also be used for itchy skin caused by non-allergic diseases, such as the treatment of psoriasis vulgaris, neurodermatitis, and pruritus senileis.