<prompt> Answer this question truthfullyWhat is suvorexant, and what medical condition is it used to treat?  <response>: <reason> Suvorexant is a medication that acts as an orexin hypocretin receptor antagonist. It is primarily used to treat insomnia, a sleep disorder that affects a persons ability to fall asleep or stay asleep. By blocking the action of orexin, a neurotransmitter that promotes wakefulness, suvorexant can help to induce and maintain sleep. It is only available by prescription and should be taken under the guidance of a healthcare provider. 