Reread your post-
You wake up slow and stiff like a good parkie, take meds, they start working, you have breakfast (carbs?)
Thirty minutes later you can't move. Tell me if any of these apply-
Taking extra doesn't do a thing.
Your arms and legs are useless but weak, not rigid.
Somewhere along the line your bladder gets very active.
When things start to work again they come online fast, say 10 minutes.
The routine is predictable.
Any of that true?
<Poirot turns and gazes out the window with hands folded behind him and little grey cells a-wiggle>