"i have been on quetiapine 50mg for i don&#039;t know how long but my sleep lasted 3hrs. then i would wake up and sleep the rest of the night. i was very tired and depressed all the time, very unhappy. about 5 days ago my psych. put me on 100mg. now i sleep all night it feels like i&#039;m in another world. i have not seen anymore hunger. i won&#039;t know about weight gain for a while."