truth serum (tr th)n. Any of various hypnotic or anesthetic drugs, such as scopolamine or thiopental sodium, used to induce a subject under questioning to talk without inhibition. |
truth serum,
a common name for any of several sedatives, such as the short-acting barbiturates, that have been administered intravenously in subjects to elicit information that may have been repressed. It has been used successfully in helping to identify amnesia victims.
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