Even knowing my wife will only be gone for a couple of hours, as n Early Stage Alz patient, I still have to trust she will be safe and return. We usually go together, so I can get. A change of scenery.

My husband used to say (this was when he was still at home but wasn't recognizing me or his daughters anymore), "You all have your jobs but what is mine? What am I supposed to be doing?" And I think it was because he was always the busiest, most hardworking person I've ever known, so it made him feel out of place and time to not have a job. I would tell him he was renovating a bathroom (one that he couldn't do too much damage to, though he did remove the door knob and messed up the cabinetry) and he would feel better about himself.
Catmama, I think that is what it is. I can just imagine how it makes you feel, though, and I am sorry that it is happening at this point. Could you tell him that he is always "by your side" in your heart? A year after my husband's death I still feel like he is "by my side" in my heart.

I think you’re exactly right, Richard. And he is on one mood stabilizing drug, taken, orally. That’s respiradone. He also gets a topical cream with Ativan, Benadryl and Haliperidol.

I don't know if this helps, but he may have been successful professionally, socially or in your Church, and wants to be "busy and useful". Not knowing where he is supposed to go next. Or what his next task is is frustrating.
Too much anxiety can be helped, medically.

I remember those days, with my husband still at home. He folded many a napkin for me. Now he often spends time, folding and refolding the napkin they give him during meal times in MC. In MC, his caregiver sometimes has him help her fold his laundry, mostly the towels.