I ve been on opiate pain medication for 13 yrs. After a bad car wreck. Have crps/rds. Recently, I ve been concerned due to several factors. I don t have a pcm right now, been scheduled yet waiting on upcoming appt. I ve gain a lot of weight in past yr or so-about 50lbs. Also, very dark urine, I m worried that the prolonged use of those medicationsites has caused some problems but not sure what it could be. Ive been on opana er and percocet for a very long time. Celexa, celebrex and a muscle relaxerstrength have been on more recently and sevreal others throughout the years.