"I&#039;m not sure why so many people like this drug for insomnia. First night took 50mg &amp; slept for 5 hours. Second night took 100mg &amp; slept for 6 hours. Third night took 150mg &amp; slept for 7 hours. So I thought everything was cool at 150mg, but after 1 week it started to become less effective &amp; was only getting 4 hours of sleep on 150mg. I would even try to split the dose (take 50mg an hour before bedtime &amp; 100mg at bedtime) but nothing gave. I think Zyprexa works better, but got on this because zyprexa makes you gain weight on ANY dose, while seroquel&#039;s weight gain is more dose related (supposedly). Stopped taking it since it sucks at KEEPING me asleep (though it is good at putting me to sleep)."