Tapentadol
"For fibromyalgia - This drug did absolutely nothing for me, like taking a placebo pill. No pain relief WHATSOEVER. I was tried on 200mg ER. I noticed that after about an hour and a half after taking a dose, I would pass out asleep for about an hour and then wake up not remembering that I even fell asleep. Very strange. I'd wake up in full blown pain and I also had stomach cramps which made my pain levels and overall experience much worse. I was so hopeful for this drug because it's said to treat diabetic neuropathy which I also have in addition to the fibromyalgia but it didn't do anything at all to relieve my pain. You'd be better off taking Tylenol instead of this, that's how terrible it is."