Antacids

n. acid neutralizer, substance which counteracts acidity

An antacid is any substance, generally a base, which counteracts stomach acidity. In other words, antacids are stomach acid neutralizers.
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Antacids are medicines that neutralize stomach acid. Purpose Antacids are used to relieve acid indigestion, upset stomach, sour [more]Antacids - Community and Resources

Noun
1. an agent that counteracts or neutralizes acidity (especially in the stomach)
(synonym) gastric antacid, alkalizer, alkaliser, antiacid
(hypernym) agent
(hyponym) cimetidine, Tagamet
Adjective
1. acting to neutralize acid (especially in the stomach)
(similar) counteractive, antagonistic

n. antacid, acid neutralizer, substance which counteracts acidity