I do not know the results of the toxicology tests. I do know they were taken but don't know if the results will be released publicly.
Just speculating here, but would it be possible to mix drugs into the infrequent meals she was eating and if she was blind-folded, she may not even know that she was drugged?
Depends on the drug, if any drug, I imagine. But I also can't imagine why they would be so delicate about getting drugs into her if that was a goal, and I'd also imagine the drugs would have been given to her more routinely than the infrequent food you mention in that hypothetical.
PS- do the Papinis know you're answering questions here?