Do you watch him take his meds? The reason I'm asking is that my son, when he became a teenager would say he took his meds when he really didn't. He was on dexamethazone and florinef, and he was always on the heavy side due to his meds. He hated it and when he quit taking the meds he would lose weight. We had a constant battle at times. My son died this mar. due to not taking his meds. right and coming down with pneumonia, he was 21 yrs. old. Do what ever it takes to keep him on the right dose.