Medicament for circadian rhythm sleep disorder

摘要

A preventive and/or therapeutic medicament for circadian rhythm sleep disorders such as jet lag syndrome which comprises as an active ingredient an alkylenedioxybenzene derivative represented by the following formula (I) wherein m represent an integer of from 2 to 5, and n represents an integer of from 1 to 3, such as 5-[3-[(2S)-(1,4-benzodioxan-2-yl-methyl)amino]propoxy]-1,3-benzodioxol, or a pharmaceutically acceptable salt thereof.