OBJECTIVE: To compare the antihistamine activity of desloratadine, the active metabolite of loratadine, with that of cetirizine in the skin wheal-and-flare responses during 24 hours.

• 目的：比较地氯雷他定（氯雷他定的活性代谢产物）与西替立嗪在24小时内对皮肤风团及潮红应答的治疗效果。