How the the so-called “truth serum” sodium phenobarbital work?
It’s a barbiturate. It doesn’t actually “make” you tell the truth so much as it addles your mind and makes it harder to think up lies, so telling the truth is just easier.
Hmm. According to this page, it’s called thiopental sodium, or Sodium Pentothal.
it also distorts your reality and makes you more suggestive. So instead of you thinking your talking to Mr Evil Torturer ™, you think your talking to your wife or your Commanding Officer.