"i have insomnia worst than most people. i&#039;m 21, i compete in body building and and i&#039;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&#039;ve tried all the sleeping medicines. there&#039;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, &quot;last night&quot; 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."