Historical clue formulations

• Tranquilized — 2015-07-06
• Under — 2014-08-08
• Feeling no pain — 2013-08-17
• Out, but not about — 2011-07-19
• Dead set against being keyed up — 2009-09-19
• Under — 2008-03-23
• Put under? — 2007-10-05
• Under, in a way — 2001-01-07
• Given a shot, maybe — 1999-07-10
• Under medication — 1996-02-09
• Quiet, now — 1994-06-12
• Quieted with Quaalude — 1994-05-26
• Put under — 1993-12-29