Ambien doesn't do anything for me. Wide awake, maximum dose. Temazepam works well, but I need to to a drug holiday for a few days after being on it awhile to restore its effectiveness. If you tend to abuse drugs, this one is not for you, as it is a benzodiazepine. An old-fashioned tricyclic antidepressant, Sinequan, works well, too, but only the brand name, not the generic, doxepin. Maybe it's the filler, but I tried it again after many years, and forgot to specify the brand name, got the generic, and I was left feeling druggy, and then I remembered that was why. It's cheap, too.
I'll do almost anything for sleep. Except for a couple of years around age 13, I've never slept well, four hours at most at a time. It's crazy making. I don't have any breathing disorders, and I'm not overweight. The brain just doesn't shut down. Lack of sleep is the most stressful thing.