how often should you have your liver and kidney
function tested when taking hydrocodone
for an extended period of time( 3 years). I have taken 5-20 mg a day, 10 mg being the norm, for about 2 years and my annual physicals & blood work say I'm fine. I'm just wondering how fast that can change and how often would it be considered wise to check. with all the aches and pains in my back I feel I wouldn't know if my kidneys
were giving me pain as opposed to my back.