Suvorexant
"Geez, people - brain chemistry is a personal thing, and so are your issues - don't tell other people "don't waste your money" because you tried something for one night and had nightmares.

As for me, it works pretty well. I've tried everything, and the only things that work are the benzo's and benzo-like drugs, however, I would need to increase the dose every night to overcome tolerance, which means I can only take them for a few nights a month. The Belsomra seems to have no side effects for me whatsoever, just a gentle urge to sleep (which can be easily ignored if necessary, unlike a good dose of ambien which is dangerous) and the ability to stay asleep or fall back asleep."