Why does Hillary disappear before debate?

One of the weapons of the Clintons is lies and deception. While the story is that Hillary spends her time preparing for the debate and rest, the reality is that she is taking what is called a drug holiday. Doctors describe how this works. The anti-seizure drugs she is taking reduce the body's ability to respond to the dugs, so she needs to stay off of them for a day or two for the drug to regain their effectiveness. For the debate then she will be outfitted with the apparatus under her clothes as in previous debates.