Rumor was it was an illegal drug that could help someone "mellow" out and help them sleep. I don't use the stuff so I have no idea if that is true or not. I could totally believe it being true about one of the contestants speculated about but not the other. One looked like he was out of it quite a bit!
There has been another tweet by Vegas stating that there will not be a revote and the original votes will stand. Several of the other contestants have also claimed that the rumor is not true. Interesting thing about the latest tween from Vegas is that he stated "He will NOT face penalty. VOTES stand."
IMO, nothing will even be said about it during the show. If it did happen, it will be swept under the rug and the casual viewer won't even know.