"i started with prozac and could not sleep at all.  with effexor 150mg, i could sleep standing up and was so sedated that i could not function.  withdrawal from 150mg to 75 to 37.5mg was ok, but after that withdrawal was hell with dizzyness and nausea.  changing back to 75mg, i still slept well, had a good sense of well being and could still function. with it 20 years now"