How to Identify Poisons and Antidotes in an Organization

I'm watching this man about to kill another man with the wrong vial cool You're just maybe drink this one. Does this look right to you? It looks precisely what you need to use roll a history check Sure, what's it for? I guess you'll find out history everyone's favorite D&D check. Yep, 11 All right, do you remember that you need an antidote? Oh, I remember that but I don't know what an antidote looks like so I'm just gonna let this man Use whatever vial he uses on this guy and if it works, that's the one I need if it doesn't I'll pick another one Okay, he chose poorly. Yeah