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So-called truth drugs have included ethanol, scopolamine, temazepam, and various barbiturates including the anesthetic induction agent sodium thiopental (commonly known as sodium pentothal): all are sedatives that interfere particularly with judgment and higher cognitive function. A book by the former Soviet KGB officer Yuri Shvets based in Washington details the use of near-pure ethanol to verify that a Soviet agent was not compromised by U.S. counterintelligence services.[5]