Historical clue formulations

• Fen-___ (former weight-loss drug) — 2012-01-08
• Fen-___ (banned diet aid) — 2008-07-06
• Weight-loss drug combo fen-___ — 2005-02-13
• Fen-___ (former diet drug combo) — 2004-09-10
• Fen-___ (diet drug combo) — 1998-01-04