Tramadol does the same to me. It claims it should make an individual drowsy, but I get the opposite effect, including a "jittery" feeling as though I'd had far too much caffeine. And when I finally can sleep, I usually have weird dreams or even hallucinations. I hate taking it and only do so when I just can't stand the pain anymore.
Doeslayer-I'm sending prayers your way for a speedy, painless and complete recovery.
