[Quit trying to “medicalize” executions. Lock them in an airtight chamber and pump it full of nitrogen. They’ll die quickly and painlessly. ]
While working in the refrigeration field in another life, I was in an enclosed space with a high level of CO2. Just got out before I passed out when I realized nothing was happening when I breathed in.
That will put you out quickly I think.
What about simply inducing a massive dose of any anesthetic like they do on animals?
Exactly. Nitrogen asphyxiation is cheap, humane, and requires zero “controlled substances”. It’s such an obvious choice that one wonders why lethal injections have any appeal.
YES!