Xanax is very addictive, just like the codeine so theres a really good chance thats what he was doing................
also this may have been said already ( I didnt read all the replies) but you discounted your thoughts .......saying something like you tend to make something out of nothing and creative imagination
well from MY experience its not our imagination. I use to think sometimes that I was just crazy or making something out of nothing.................BUT in time I found that if I trust my gut I am always right!!!!! those feelings and suspicions dont just come out of nowhere...............at least they never did for me