I recently changed ads from sertraline to Fluoxetine and have had terrible insomnia. I feel very tired & drowsy during the day but some nights only get a few hours sleep & even if I do fall asleep I'm always woken in the early hours & can't get back to sleep. Been on fluoxetine for 7 weeks & , it's not settling down. Change of meds was due to menopausal symptoms which my GP thought would be helped by fluoxetine. Can't really tell if this is,any better as just so tired & headache all the time. Any advice?