So I just re-watched the episode A Friend in Need. I've heard the argument that Pre Vizsla was drunk when he fought Ahsoka, yet there is absolutely no evidence to support this claim. Let's say he did actually drink at the feast, his engagement with Ahsoka was a full day later, and he showed no signs of slurred speech or impaired movement. When the Chief of the nearby town confronted Vizsla, Vizsla said that he was to return their people to them the following day in the morning.
"And you'll return our people to us?"
"Yes, sunrise tomorrow."
And by the time he fought Ahsoka (after she had been dragged on the ground, tied by freaking wires and/or ropes an undisclosed distance) it was clearly evening or night. So there is no way he was drunk.