"i am bi/polar and awaken many times around 2 or 3 am with racing thoughts. this makes it impossible for me to go back to sleep and i am exhausted because of it. my dr. had me try the sonata and with taking it at these times i can get another 3 to 4 hours of sleep and  awaken feeling very rested. i usually fall back to sleep within 15 minutes after  taking it. love it on those rough nights."