I have just returned from the UK where I joined celebrations for my parents diamond wedding anniversary. Mum got her card from the Queen, so she was happy. And Dad was running round like a toddler, on his feet all day at the party, nobody even remembering we had a wheelchair available. At my sons wedding 6 months ago he couldn't move 20 feet without a wheelchair.
This is almost certainly due to him finally (with a lot of pushing from me) having a colonoscopy which has identified his anemia is due to colon cancer, and providing him with iron infusions pending surgery on 6th March. The orthostatic hypotension had been his neurologists and geriatricians diagnosis, but I wonder if the diziness and thigh muscle cramps were due to oxygen starvation due to anemia.
Certainly the iron infusions have us forgetting that he has a wheelchair, and in the 4 days I was with them, he never even looked likely to "wobble". On my last visit, whenever he moved round the house, somebody shadowed him with a chair to collapse into.
Just hope the surgery is a success. He looks fit enough to survive it now - and you couldn't have said that 6 months ago either
This was massively his most disabling "parkinsons" symptom. He still has the others, well controlled by sinemet, but is a new man at the moment.
It's always worth bearing in mind that just because you have PD doesn't mean you can't get other problems too.