"i take norco for chronic pain in my back and leg. my tolerance for was very high, though when i was dosed up on it i could do my job very well (construction laborer). gabapentin 300mg 3x day has helped. on the first day i expected immediate relief but felt nothing and was going to call the doctor in the morning to complain. when i woke after sleeping through the night for the first time in a while, i was surprised that my back pain was diminished to the point that i was surprised. after reading here other reviews, i going to have my dosage upped to see if it can completely cut off my pain. i am pending an mri and likely epidural procedure. side effect though, when i try to work, i can feel my (extensive) injuries."