I had a pain Doctor who would ramble on and on when I would visit him. He told me this interesting story. He would persribe opiate medication to doctors who were supposedly in pain..he would give them MSContin or Methodone for there conditions but some would request MSir only! He said he knew those Doctors were faking the pain..MSContin is great for chronic pain but MSir is great for just getting high!The doctors in question had gone thru rehab and were refered to him because he knew all the tricks his fellow doctors would pull to secure the most powerful opiates.