My husband s lithium was a little too high so the doctor switched him to depakote( valproic acid) 250 mg day and night, just a few days ago. On top of that he was on olanzapine 5 mg for one week and now it s been increased to 10 mg 2 days ago . Today he is so sleepy that can t do anything. He just feels extremely tired and wants just to sleep. We went somewhere he found a couch and slept. Is This normal? And will it go away after a few days or does that mean that the 10 mg of olanzapine is too high.