... I got a prescription three years ago for my back and have since been unable to stop taking them. I don't overdo it I never take more than 4 a day most days I only take 1 or 2 I can go weeks without them but it seems like I cannot completly rid myself from them. I am scared my liver is going to stop functioning properly, I've heard they destroy it but didn't know if that was only if you misused it. The pains I get seem to get worse if I don't have them but I feel like my day will be horrible if I don't take them.