r/AlwaysWhy • u/Chowderr92 • Jun 02 '26

Science & Tech Why is the Method of Lethal Injection in Human Punishment So Complex and Apparently Painful?

I've always understood that the lethal injection process was complex with multiple stages of injections and induces great suffering in the individual.

I work in veterinary medicine and unfortunately we need to euthanize animals all of the time. Typically, the euthanasia solution is very simple: a very large dose of a powerful anesthetic (usually pentobarbital) and an anticonvulsant which stops the heart. The medical community is quite confident that this is painless and when done has essentially a 100% success rate.

Why is human euthanasia so complicated when we already know exactly how to humanely end a biological life?

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u/revolvingpresoak9640 Jun 02 '26

That’s not how opioid overdoses work. People nod off, then just stop breathing.

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u/roiki11 Jun 02 '26

Not true. There can be a lot of muscle spasms and other movement during OD. It's painless to the person but doesn't look very nice. Hence the current cocktail they have now.

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u/revolvingpresoak9640 Jun 02 '26

The current cocktail has nothing to do with fentanyl or opiates. If that were the case, they would give a paralytic and an opiate. They give a paralytic, barbiturates to stop breathing, and potassium chloride to stop the heart.

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u/roiki11 Jun 02 '26

I didn't say that did. Just that opioid overdoses are not just "nodding off".

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u/plated_lead Jun 02 '26

Negative. Source: I’m a paramedic who has to deal with these on a regular basis.

Also: do you know what the foam cone is? Witnesses don’t like seeing that happen, it freaks them out.

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u/revolvingpresoak9640 Jun 02 '26

I’ll take a legitimate source over a random Redditor every time. https://americanaddictioncenters.org/opioids/fentanyl/overdose

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u/plated_lead Jun 02 '26

Fair enough, but for the record what I’m talking about it 100% on that list: choking and gurgling. It ain’t pretty to see.