Sleeping all the time. Any suggestions?

Did his increase in sleeping occur before or after the depression medication? My 83 year old mother was put on Citalopram for her depression and it initially worked great, so the doctor decided to increase it by 5mg. That extra 5mg turned her into Sleeping Beauty! If I hadn't woken her up to take her medication or to eat, she would've slept forever. I didn't like what this was doing to her, so I asked the doctor to cut back that 5mg and she literally went back to her old self within a few days. The suggested max dosage for anti-depressants for seniors is 40, so I would check with his doctor to see if the anti-depressant medication needs to be adjusted.

My Dad's fill-in caregiver use to take him to the local mall for a very short walk, then to "people watch". The caregiver was a male, so it was a guy thing watching the gals walking by. Dad [96 at the time] enjoyed the outing :)

I think what FF wrote is very true and we forget that there is recovery going on internally after time has passed. Meds May give us extended life but they often take the quality of life. It doesn’t have to be just cancer drugs. Ask his dr for him to have physical therapy at home. The exercise can increase his breathing and help him increase his energy. Have his B vitamins checked and his Vit D increased. Aromatherapy is helpful and music. You must change some aspects of his life for his mood to change. Watch funny movies with him and laugh. Bring him flowers. Expose him to therapeutic pets and babies and pretty girls. Tell him jokes. Tell him your troubles. Put his clothes in the dryer before he puts them on. Chocolate milk shakes are nice. Try CBD oil.
Massages, mani, pedis make everyone feel better. Cranial massage. The list goes on. If you are having a good time with him, he’s probably having a good time too. Give him a hug for me.

Annbolly, at 90 one will sleep, they are tired, they had a very long life. My folks were in their 90's and 9 times out of 10 I found them fast asleep in front of the TV.

Plus at 90, there isn't a whole lot one can physically do, such as handyman things around the house, or yard work. Sleeping becomes a hobby.

I do suggest that you make an appointment for your Dad to see his primary doctor to make sure this is just age related. Oh, did you Dad take any med for his prostate cancer? If yes, those meds can tire one out years after the fact.