PROBLEM TO BE SOLVED: To provide a method and a composition for treating insomnia.SOLUTION: A dosage form includes a drug substance useful in the treatment of insomnia. The dosage form is adapted to release the drug substance after a lag time during which substantially no drug substance is released, and the lag time is about at least one hour after administration of the dosage form.【課題】本発明は、不眠症の処置用の方法および組成物に関する。【解決手段】不眠症の処置に有用な薬物物質を含む剤形であって、実質的に薬物物質が放出されないタイムラグの後で該薬物物質が放出され、タイムラグが剤形の投与後少なくとも約１時間であるように適合された剤形の提供。【選択図】なし
