There is another post that is sounding an alarm on inert gas asphyxiation which I think is quite important but it's flagged, presumably because of a sidebar admonishment about drug addiction.<p>Breathing inert gasses is extremely dangerous. It is not like holding your breath: because the gas you inhale is free of oxygen, it actively pulls oxygen out of your blood. Instead of thinking about breath holding, think more like the USCSB videos where someone walks into a space with a nitrogen atmosphere and immediately drop unconscious, then someone goes in to save the first person (already knowing about the danger) and they both die. ( <a href="https://www.youtube.com/watch?v=f2ItJe2Incs" rel="nofollow">https://www.youtube.com/watch?v=f2ItJe2Incs</a> ).<p>When narcotic gasses are used for anesthetic purposes they're used with a gas manifold that mixes in pure oxygen to achieve a gas mix that won't kill the subject. Even this is easy to get wrong, and a wrong mix due to a flat tank or an incorrect setting can kill someone very quickly and quietly.<p>It's also not clear to me how psychologically safe it is, I've seen at least one clearly unhinged person on twitter going on about their xenon use... but I dunno if the drug use lead to they psych issues or the psych issues lead the the drug use. or if their issue was just related to inadvertent oxygen deprivation as a side effect of their xenon use. Studies of anesthetic use may not tell us much about recreational use since they're presumably not dosing people daily or multiple times daily for weeks at a time. -- it's not like you can easily purchase single doses, that bottle isn't going to use itself!