It is intended to provide an agent for treating and/or preventing sleep disorder containing as an active ingredient a thiazole derivative represented by the general formula (I) (in the formula, R
1
represents a five-membered aromatic heterocyclic group containing at least one oxygen atom or the like, R
2
represents halogen or the like, and R
3
represents —NR
10
R
11
(in the formula, R
10
and R
11
are the same or different and represent a hydrogen atom or the like) or the like) or a pharmacologically acceptable salt thereof.
该发明旨在提供一种治疗和/或预防睡眠障碍的药剂,其活性成分为一种由通式(I)表示的
噻唑衍
生物(在公式中,R1表示至少含有一个氧原子的五元芳香杂环基团或类似基团,R2表示卤素或类似基团,R3表示-NR10R11(在公式中,R10和R11相同或不同,表示氢原子或类似基团)或类似基团)或其药理学上可接受的盐。