or your players
Venom vs poison
https://en.m.wikipedia.org/wiki/Venom
Venom goes in a cut. Poison is swallowed. You can swallow some venom without harm.
Poison is generic. Venom is specific to normal method of delivery (e.g. snakes and bees).
Swallowing venom may or may not hurt you. Probably not a great idea, but there’s a better chance you’ll be okay.
Getting a known poison stabbed/injected intravenously seems likely to be pretty effective, but it depends on the mode of action. Blood goes everywhere in the body, so it will likely find its target eventually.
Alternatively, his blade was not very deadly unless he got it in someone’s mouth.
https://www.merriam-webster.com/dictionary/poison
“a substance that through its chemical action usually kills, injures, or impairs an organism”
Poison doesn’t have to be swallowed