He feels very sleepy 2 hrs after eating. He seems to be in a downward spiral where he has no energy, yet doesn't feel very hungry. Therefore he doesn't eat much, which doesn't give him fuel....(I tried explaining this to him). He says he feels better after he eats, but then after about 2 hours he suddenly feels very sleepy again. He keeps loosing weight and muscle mass. His balance is getting worse, so he hunches over when he walks (sometimes with a walker) so he won't fall backwards. Generally speaking, this is a man who was very physically active until about age 75. He's had 2 hip replacements, recovered okay from them. My mother passed away almost 5 years ago. The first 2 years he seemed physically okay, the 3 year he slowed down a little and moved to an independent living facility. Year 3 even more so and now on year 5 he seems to be rapidly declining. He says he shouldn't be this way and has sent me the task to "look up on the computer" what is wrong with him.
I spoke with both his physiatrist and orthopedic surgeon but both were unwilling to recommend one as they felt (as did I at the time) that exercise was the better option.
My father already had fairly severe osteoporosis, and even though he did exercise, he still had occasional back discomfort. The bigger issue though was the aberrant posture caused by the osteo.
So I called DME suppliers, found one that also had a rollator, and away we went. It was $40 or $45; we had no script, so it was paid out of pocket (and of course logged in my tax files as a medical cost.)
The only problem is that he can't latch the Velcro tabs himself so he needs help to put it on.
I think your first option should be his medical team, starting with his internist or PCP (if that's a very thorough doctor; some aren't). I would take him to an orthopedic doctor as well to address what may be osteoporosis.
There's a possibility of getting a back brace as well; the one we bought is made of really thick and tight elastic and does provide good support. We purchased it despite recommendations to the contrary by a physiatrist and orthopedic surgeon, who felt that exercise was better. We agreed, but at the stage of osteoporosis my father has, he needs some support - now.
PT would help as well if your father can get his energy back enough to do PT; that will certainly give him more balance strength.