Both loratadine tablets and cetirizine hydrochloride tablets belong to the second generation of h1 receptor gilts, which mainly exert anti-allergic effects by antagonizing h1 receptors, and can be used to treat pruritus, allergic rhinitis, urticaria and other allergic diseases. The main difference is that cetirizine hydrochloride tablets, which can also be used for the prevention and treatment of allergic asthma, and for seasonal allergic rhinitis, may be more effective than loratadine tablets. However, these two drugs are recommended not to be used casually, but under the guidance of a doctor in order to bring out the best therapeutic effect of the drug.