I had that problem when I was using antidepressents for sleep. I'd have endless very vivid lucid dreams and then still feel exhausted the next day. I don't think I was actually getting REM sleep but it was better than no sleep. I sleep much better, with better dreams, and feel rested using meds targetted for sleep like lunesta and ambien instead of antidepressents and hypnotics. If you also need an antidepressent seroquel is a good one. It's an antipsyhotic/antidepressent that is heavily sedating. Lots of people on the anxiety boards use it for sleep. It doesn't seem to interfere with rem sleep like other antidepressents I've taken. However the recommended dose is usually way too much for most people and so they quit taking it. Doctors try to get you on 200mg where I started with half a 25mg pill and over the past 2years slowly went up to 150mg. That's almost too much for me and makes it hard to wake up sometimes. You will sleep if you take enough seroquel but too much will make you feel out of it all the next day and just want to constantly take naps.