Tapentadol
"I have been taking Nucynta for about six months. I am 5'4, 220lb, 42 year old female. This medicine worked very good 6 months ago, still works, but not long enough, and break through pain is stronger and returns faster. Side effects for me are dizziness=mild, thirst=severe,voice change=severe, sleepiness=mild, agitation=increased enough to have to say I'm sorry. Also a strange eye problem kind of feels like my eyes are yawning, but I am not yawning. "