Morphine
"Morphine sulphate IR does help me to function on a daily basis.  I take it in conjunction with MScontin. I suffer from fibromyalgia, degenerative disc disease, carpal tunnel, herniated discs, ruptured discus, and I also have hepatitis C.  Therefore taking anything containing Aspirin or Tylenol would compromise liver health.  I also have chronic pancreas.  I am afraid to have surgery, I have blood drawn every 3 months to check my liver function checked.  I have remained in remission for over 3 yrs this time.  I did have a bout of pancreatitis 2 months ago. I don't drink alcohol either."