艾司西酞普兰（英语：Escitalopram），或称依地普仑 ，商品名为来士普（Lexapro）等，是一种选择性5-羟色胺再摄取抑制剂（SSRI）类抗抑郁药。 美国食品药品监督管理局（FDA）批准其用来治疗成人和12岁以上儿童的重度抑郁症（MDD）和广泛性焦虑症（GAD）。艾司西酞普兰是早期灵北药厂生产的西酞普兰的(S)-立体异构体 (左-对映体)，所以在名称上增加了“艾司”（es）二字。

Escitalopram, also known by the brand names Lexapro and Cipralex among others, is an antidepressant of the selective serotonin reuptake inhibitor (SSRI) class. It is approved by the U.S. Food and Drug Administration (FDA) for the treatment of adults and children over 12 years of age with major depressive disorder (MDD) and generalized anxiety disorder (GAD). Escitalopram is the (S)-stereoisomer (Left-enantiomer) of the earlier Lundbeck drug citalopram, hence the name escitalopram. Whether escitalopram exhibits superior therapeutic properties to citalopram or merely represents an example of "evergreening" is controversial.