Help Fentanyl or nicotine or sodium fluoride or sodium nitrite?

[melp]

I wonder what would be better? SN and SF I can buy legally on the internet. I may as well have liquid nicotine. If I decided, I can only buy fentanyl in a darknet.
If you have any interesting links, I'd love to read them.

Ps.
Will any poison not make you vomit?

 

[autumnal]

SN is well covered in the two key resources.

I definitely would not recommend sodium flouride as a suicide agent, as it is only used in overdose quantities as an insecticide or pesticide, and these generally aren't peaceful deaths for the animal or human recipients.

Nicotine poisoning has been covered previously on the forum, if you do a search. I vaguely recall the general consensus was against it due to the unpleasantness of symptoms surrounding hyper agitation and alertness.

Fentynl is covered on dedicated threads you can find via search.