Historical clue formulations

• Fizzy headache remedy, informally — 2017-05-01
• Stomach settler — 2007-03-11
• ___-Seltzer — 2006-07-03
• Stomach soother, for short — 2005-06-20
• Stomach soother — 1998-12-07
• Oh, what a relief it is! — 1996-08-18
• Fizzy remedy — 1995-03-24
• Upset solver? — 1994-09-18
• Headache easer, for short — 1993-12-10