Quetiapine
insomnia
"After having been tried on every sleep med for insomnia (benzodiazepines, non-benzodiazepines, Belsomra and a few antidepressants), I asked my Dr if I could try Seroquel (quetiapine) having taken it about 15 years ago. 
I've had insomnia for years and years. About 20 years ago I was put on Seroquel 50 mg and it helped a lot. It worked again for me, however I was on 400mg for at least 6 months. I hadn't had more than 2-3 hours of sleep for years and immediately slept through the night. I am currently taking 200mg and hope to decrease that amount as I've gained 40 pounds over the past two years and exercising and dieting have not helped.  Lose weight but go back to insomnia, sleep well but remain overweight. I love/hate Seroquel!"