Is it possible to wean off seroquel (quetiapine) and get normal sleep patterns back? i heard there is long lasting insomnia and it never good back to normal.

It depends: it depends on what the medicine is prescribed for, the insomnia is not inherent in the absence of sequel. an example is someone with Diabetes started on insulin, he may need it indefinitely not because he was started on it , rather because his body needs it. so discuss with your Doctor. very often we wean Sequel off and the person sleep goes back to normal . good luck and feel better

Depends: If the condition for which it was being taken happens to be in a state of remission (and the Seroquel (quetiapine) is not an essential condition for maintaining that remission), then it's possible that sleep would be ok after a period of tapering/weaning.