I struggle to see how these could be painful if done right, you'd be dead before you could even process these. Though I understand that just gulping down is much easier.
I have been meaning to ask, do you think it would help if I started drinking alcohol to build myself up to dealing with the N taste, and possibly stop myself from throwing up? I cannot handle any alcohol so I think I would just throw up my N. What % would I start with, as low as possible?
"If" being the operative word. Certainly not "peaceful", though, and certainly messy and violent.
Not speaking authoritatively here, but: Generally speaking, you can get yourself used to unpleasant tastes by acclimating yourself to unpleasant tastes, sure, learning to control your gag reflex. But to prepare you specifically for N? Probably would have to get used to something bitter, caustic, and medicine-like.
Reports from users here who've taste-tested it have said it's not the initial taste so much that's bad (though it is, though they said the fear is overblown), but the aftertaste, once it sets in. But then, it's only for a minute or so before you pass out. There are worse things to endure. (Like, kidney stones...) And if you eat a chocolate right after, it's supposed to help. But just best to take it in a few gulps, and it won't be that long after.
But as for alcohol, and actually drinking it? There's a risk for alcoholics that liver damage affects the enzymes that breaks down the N and effects its effectiveness. But that's probably long-term, though.