I use 18 mg/ml nicotine freebase. Sorry to read of your obviously crappy experience with 18 mg/ml, nicotine salts. Not had any such experience using freebase.
Lends to me wondering is there that much difference between salts & freebase?
From my limited understanding, nicotine is nicotine, is nicotine. That is to say 18 mg/ml is the same as 18 mg/ml nicotine in either freebase, or salts. Nicotine is nicotine after all.
Maybe my physiology is just wired that far differently too? Oh heck, did I go from being a carbon based form of life to silicone based one? Can we change the flickering light bulb in cell D 52? Thanks, the resident there is having flashbacks bad enough.
I'm making light jest because it is better to laugh at the negative, move forward to the positive. Do not mean to belittle anyone's bad experience/s. Well, I do but in a manner that we can all try to let the bad go easier. That's part of what humor is used for, softening the reality of being human and facing life as we do.
Amoeba spend eons laughing at something blocking forward motion. They're single celled organisms what live by trial, & error. Why not laugh at some funny shit right there they think, or would if given a brain.
The point being they do not stop moving forward. No, they simply alter course, keep moving forward. Good enough for them, surely good enough for me.
Might try some 12 mg nicotine juice/salts, or even 3 or 6 mg., If 18 mg is going to tear you up so bad as to cause vomitting, you'll want to avoid stronger nicotine strengths, if not nicotine all together. If you're under 21 years of age please do not vote, join the military service, drink spirits, use tobbacco, vape, get married, have any religion, have sexual intercourse. Think we ought to codify 21 as the universal age of consent, adulthood.