Synonyms for truth-serum

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR TRUTH-SERUM

Then, abruptly, "Are you sure that was truth-serum in that hypodermic?"

So the doctors gave him truth-serum so he would not try to conceal anything from them.

What sort of talents and abilities did he possess, that he could react thus to a truth-serum?