you should try physio or massage rather than codeine. codeine is a very strong painkiller, which is opiate based-heroin addicts are given it to help control their withdrawals in hospital and police custody and when they cant get a hit on the street their only option is codeine! it can cause fatigue and sleepiness, constipation. sleepinesswhich is why he is reccomending it azt night. its also highly addictive. if you go to talk to frank . com it explains more there. only use it if you really have to or really cant sleep because of the pain