It's right up there with the most pestiferous alkaloids (in my ancient Manual of Pharmacology.)
A drop or two of the pure substance--applied to a mucous membrane--was said (elsewhere) to be fatal to a med. dog sized creature. But the usually quite dilute 'vape'-grade stuff, and via stomach? sounds like a way to go gradually and painfully. aka Dumb.

Jeez ... go out super-calmly: just OD on diacetyl-morphine aka heroin. People won't even do a little chem homework on what to use for your very-last dose of anything. Be lazy/so suffer.