Expanding on my comments from the ALiEM Patwari Academy post on snakebites, here is some data behind neostigmine use in elapidae bites.
Many beach locations recommend the use of vinegar for jellyfish stings, and some go so far as to stock it at lifeguard(surf rescue) stations. But why did they decide to do that? Were there lots of studies performed?
Mark Little tackles the topic of herbal and alternative medicines at SMACC with his talk, 'It's natural, therefore it must be safe'.