Board Thread:Rebirth: Story Time/@comment-4869113-20141109220441/@comment-24070327-20141110014439

Itachi was working for Akatsuki, a la Amegakure, so he had some pretty good resources at his disposal. Madara had some pretty neat gear as well as Hashirama's hax healing properties and those didn't help him. But I do get your point.

Only problem with most of those counteractive methods is that they require having prior knowledge. And the whole point of stealth poisoning is that there is no prior knowledge. It's true that Kurama MIGHT be able to bail Naruto out of trouble. But this a sure-kill towards Sasuke. The symptons wouldn't show up for Sasuke until lethal damage had already been done. Sakura and Tsunade may be able to counteract the poison, but that wont eliminate the damage that has already been done. Of course, those two may also be able to heal that damage as well because of how hax they are. But then again, let's not forget the fact that Sasuke seems to be wandering around. So he might not even be in a position to seek help from Sakura and Tsunade when the symptoms star to show up.

If you're not hasty with it, you could probably succeed at killing Sasuke this way. But I agree that Naruto's Kurama healing would make him impossible to kill with poisoning.