Definition of "antacid"

Until Tagamet (cimetidine), most major drug companies didn't take tummy troubles terribly seriously. Oh sure, Americans gorped down antacids almost like candy, but most pharmaceutical big wigs probably wrote that off to our penchant for eating junk food on the run.

1985, Joe Graedon, Teresa Graedon, The New People's Pharmacy: Drug Breakthroughs for the '80s, Bantam, page 134

I'm on warm milk and laxatives Cherry-flavored antacids

1993, “Pennyroyal Tea”, in In Utero, performed by Nirvana