Hillary made a few statements to the effect that after the third debate, she was going to be out more (”no more naps”).
I would guess that they have planned for a final push, and have carefully considered how to manage her medication loads for it.
Along with that plan, they need to have a strong plan B, to pull her off the campaign trail at a moments notice, make excuses, and squelch any reporting. It is a major risk for that campaign.
If she is elected, it's going to be one big "nap", representing a lower circle of hell for the fortunes of our formerly proud republic.
The planning might involve that implant under the skin of her right cheek.