"was using fentanyl patches but they caused me excessive sweating, so got switched to this.  despite having had a gastric bypass which should have rendered this ineffective for me, my doctor has me take it twice a day instead of once, and it&#039;s the best pain medicine i&#039;ve ever had.  it started working within an hour, and i love it.  even been on percocet, which i hated and didn&#039;t do anything at all for me, and butrans, which made me suicidal, and a bunch of others.  this ones the tops!"