A farmer I know, tough as feck he is, was advised to take Primrose Oil tablets for his bad back. Sure enough they did the trick and he's improved no end. I know women are told to take them when they're going through the change but they've certainly helped this fella out. My old man has just started taking B12 supplements to help with his tiredness. Bingo, he's bouncing off the wall now. So, perhaps try speaking to the folk in Holland And Barratt, they may recommend an alternative to pain killers