insomnia
"I have insomnia worst than most people. I'm 21, I compete in body building and and I'm in great shape.  I never get tired. If I get 3 hours of sleep a night I can still function fine the next day. But it shot me into horrible anxiety and depression from lack of sleep. I've tried all the sleeping medicines. There's no doubt Ambien will knock you out but I always wake up 4 hours later. I just started taking Lunesta because I was so desperate to get sleep.  Lunesta the first night helped me sleep 8 hours. The second night, "last night" it took about an hour to come into affect but I definitely slept 9 hours. No bad taste. I feel amazing. It definitely works all night . If you need a full nights sleep, please try it."