"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&#039;ve had in years. i&#039;ve been on vicodin, percocet, ms contin, naproxen, norco 10mg and i&#039;ve never had total relief until now. "