When he'd been conceptualizing getting sedated, gas wasn't what he expected. There are plenty of straight up magical spells that do similar, after all, or even potions - someone turning into smoke and flying in his face comes as a bit of a curve-ball.

He could restrict his breathing and stave it off, but in that moment of panic he doesn't. It doesn't take much to cause his already failing constitution to topple over, and with his skull drowning in purple gas, it doesn't take much before his head is already swimming. His kicks slow, his tail going limp.

"Don't, please," is the last thing he manages to say before his eyes fall most of the way closed, leaving only slits of empty socket at the bottom of each.

With the amount he's been poisoned by people lately, he can only assume that something worse is to follow.