Demerol
"As Percocet was not helping my back pain anymore my Doctor switched me to Demerol 100mg. Now my back pain is once again under control and I am only taking two pills a day instead of 6-8 Percocets. I have had no negative side effects as of yet. This is by far the most relief I've had in years. I've been on Vicodin, Percocet, MS Contin, naproxen, Norco 10mg and I've never had total relief until now. "