insomnia
"I take Ambien, Ambien CR and rotate to Lunesta briefly when they build a tolerance. Ambien is first rate though. They all have an odd effect of not drifting off - I blink and wake up in the morning. I'm ok with that. Ambien CR makes me a bit cranky if I wake early, like the cat waking me. Otherwise they all work, and fast, like 30 minutes. I have a small amount of Ambien CR left, which I think is the best but it's expensive. The others are generic, but work ok."