There was a lenghthy list of possible problems included allergic reactions & severe stomach problems. If anyone had previous reactions or stomach problems from NSAIDs they should be careful of this stuff. Also, codiene can cause a terrible constipation problem. My mother had some of that stuff when she was dying of cancer - before they would give her morphine - and it really caused her alot of intestinal & bowel problems which are too morbid to go into here.
Taking strong drugs like codeine may give some pain relief but also at a price -- and if taken over a long period of time many may be worse for your body than the original problem... so please be careful, Paul, and good luck to you with your PF.