"i&#039;ve had insomnia for twenty years. i&#039;ve tried everything and only ambien works for me. knowing this, my doctor suddenly wants to to try belsomra and gave me all the free samples- 5, 10, 20 mg. they all give me nightmares. not just standard nightmares- like the worst possible nightmares, vivid and frightening nightmares for hours straight. then i would wake multiple times and be wide awake. i threw all those pills in the trash. i would not recommend belsomra to anyone for insomnia. it&#039;s a total marketing scam. and here&#039;s the kicker- the company knows that this medication causes nightmares and doesn&#039;t list it as a side effect. sad."