帕罗西汀（Paroxetine）是一种选择性5-羟色胺再吸收抑制剂（SSRI）型的抗抑郁药，其药物形态为盐酸帕罗西汀（Paroxetine hydrochloride），商品名为“赛乐特”（Seroxat）。在临床上常用于抑郁症和强迫症的治疗。

由于全球第二大制药商葛兰素史克股份有限公司对盐酸帕罗西汀的专利已过期。因此国内市场开始有「乐友」、「舒坦罗」等一些自主技术的盐酸帕罗西汀上市。其价格只是葛兰素史克股份有限公司生产的赛乐特价格的50%。

Paroxetine, also known by the trade names Paxil and Seroxat among others, is an antidepressant of the selective serotonin reuptake inhibitor (SSRI) class. It is used to treat major depressive disorder, obsessive-compulsive disorder, social anxiety disorder, panic disorder, posttraumatic stress disorder, generalized anxiety disorder and premenstrual dysphoric disorder. It has also been used in the treatment of hot flashes and night sweats associated with menopause.