My 83 old father is in a care home with dementia.....he has complained of back and leg pain (I'm sure he has lewy body dementia as he has quite a curved upper back and leans to one side) so his Dr. has prescribed hydromorphone is small doses.  He has been getting this for about a month and barely gets out of bed now.  He is sleepy all the time and does not eat.  I don't know what's worse, seeing him in pain or seeing him slowly starve himself to death as he doesn't want to eat much at all.  They are giving him a high calorie boost.  He says his eyes feel like they are shaking and he is seeing things now.  I know that when he's been on medication before he was seeing things on the walls.  I'm wondering if there is anything else that can be prescribed.