I am living full time with my 80 year old father in law. I know what meds he is on and monitor them. But even before he began these meds, he was falling asleep sitting up all the time. I'm just wondering; is it normal for him to continually dose off and on all day and during the evening? He loves to watch tv all day (tried to get him to do things, but he just wants to watch tv). Is this just an old age thing?