My AH used suboxone on days he didn't want to be sick. Its possible to use seboxin and get high 8-12 hours later depending on how they feel. This toxic Mix can cause respitory depression. It sounds like this is what hes doing Bc the suboxin is cheaper and helps carry him from one high to the next. Behavior is a HUGE red flag. I count that more then catching him in the act. I don't need proof. He has all the tell tale signs when hes up to old tricks. Addiction is a disease. He sounds like hes on a downward spiral. Sorry. I wish I could tell you differently.