Suvorexant is a prescription medication used for insomnia, particularly for both difficulty falling asleep and staying asleep. It is an orexin receptor antagonist that works by blocking wake-promoting signals in the brain, helping facilitate the natural transition to sleep.

It has a relatively longer duration of action, which can improve sleep maintenance, though some patients may experience next-day drowsiness. It is generally well tolerated, with side effects including fatigue, dizziness, and rare sleep-related behaviors. Compared to traditional sedatives, it has a lower risk of dependence, but it is still used cautiously and typically after or alongside CBT-I.