My 26 year old son is an addict and mentally ill - currently on suboxone for drug cravings. He has been on and off of medicine and won't go back on any. He doesn't think there is anything wrong with him. He hasn't been officially diagnosed, but is schizoaffective i think. How do you get them to seek help, listen to a doctor and take medicine. He doesn't listen to reason, is in denial and cognitively affected.