It is not totally fine. It's as far from the realm of totally fine as it's possible to be. This stuff will kill your liver, you know. It will rot your brain. Do you want to turn into Gan Nang? [oh wait, maybe he shouldn't have said the last part out loud. Still, it was true and Mikey didn't drink.

Well today.

But just to show Raph that he was perfectly capable of being just as much of a badass, he'll drink it all at once and twitch a few times, his tongue lolling out]

Not... [bangs a fist against his plastron and coughs] not bad at all.