About 8% of the population is unable to metabolise codeine to its active metabolite, morphine, leading
to codeine not working for them as pain relief.
That's interesting, in hospital they gave me oral morphine as a top up and i'm sure that did absolutely nothing.
I do find Ibuprofen works very well for me though, first sign of gout and i do a double dose for a day with loads of water which usually does the job. I always take a months' worth in my holiday drug pack.