I abused lortab which is an opiate for many years. I went through a period of sluggishnesh and not alot of energy but little depression. Exercise is a good way to get the dopamine flowing it give the natural euphoric high I guess. I watch that show too I didnt agree with it really. Sub and methadone might work for some but I think it should only be used short term like a week to get u through detox then some counseling or some kind of treatment. Where theres a will theres a way. It the cravings that would bring me to my knees and they didnt hit hard until about 6wks clean. Consumes u hard hard hard to deal with. Your brain still wants it and will take over your every thought. thats when most my relapses happen. besides the occasional use for chronic pain not abusing its been almost a year. Until I get my knees replaced its still needed once in a while but only as a last resort. Good luck with your son. Watch for change in behavior. Cravings will hit.