Thank you for all your replies and advice. I decided on my boundaries and what he needs to do to continue living in our house. Because I feel it is easier to say things through writing and then discuss them after he has had time to process, I sent him an email. Regardless of the circumstances with the pills, he has lied a lot and continues to be secretive and that is not ok. Also, he can't keep up with bills and he bought a bag of pills. Regardless of who is taking them, he brought those into our home. So, I set my boundaries that illegal drugs in the house is not acceptable. That not being transparent is not acceptable. And abuse of drugs is not acceptable. Honestly, I don't see him admitting to any of this or taking responsibility, so I am trying to make a list of what will happen next. Because if he cannot meet these boundaries, then he will need to find another place to live.