came home to find son almost asleep in his car. He startled when he heard my car pull past him. Got out of car and he could barely stay awake walking. Kept saying he was tired. Got inside and he sat in a chair. He started talking like it was Monday. Said, no it's tuesday. Asked where he had been and he said work. I asked if he did a double shift and he said no. So I asked where did you go after work. He said no where, I just came home. He has no recollection of what he did today. With that he fell asleep. We woke him up to get him to go into his room. Fell up the stairs as he went. Then he did a complete turn around. He became more awake and making more sense but still has no clue where he was. Of course denies taking or drinking anything. It's been an hour and now he is finally listening to us and going to bed - has to get up in a few hours for work. What are your thoughts?