pain
"I have had 12  hospital stays in the last 2.5 years each for at least 1 week due to Pancreatitis.  During this time, I have had 4 surgeries (galbladder, 30% of Pancreas, Spleen, Gastric Obstruction) on top of these "visits".  This is the only drug that actually works on the pain for me.  It doesn't give you a light show like Demerol, it just kills the pain period.

Only con I see is that tolerance builds quickly.  I usually need 2 mg every 3 hours to stay up on the pain, but I have been up as high as 4mg over 3 hours for a few days."