Origin of truth serum
Examples from the Web for truth serum
Historical Examples of 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.The Leader
William Fitzgerald Jenkins (AKA Murray Leinster)
What sort of talents and abilities did he possess, that he could react thus to a truth-serum?