From Longman Dictionary of Contemporary Englishantacidant‧a‧cid /æntˈæsɪd/ noun [countable] a substance that gets rid of the burning feeling in your stomach when you have eaten too much, drunk too much alcohol etc
Examples from the Corpus
antacid• Magnesium hydroxide, normally used as an antacid or laxative, may also serve as a magnesium supplement.• Importantly, prophylaxis against stress ulcers with H 2 antagonists and antacids has been implicated in abnormal bacterial overgrowth in the stomach.• Drugs such as anticoagulants, antacids, barbiturates, alcohol and tobacco may increase the likelihood of the condition developing.• It is known to develop in individuals with peptic disease who ingest large amounts of calcium-carbonate-based antacids.• The hypercalcemia is easily treatable by hydration and withdrawal of the calcium containing antacids.• Apart from antacids none of the patients had taken any medical treatment during the 14 days before their initial endoscopy.• It also occurs in alcoholism, diabetic ketoacidosis, and in patients taking antacids which bind phosphate in the gut.• Indigestion had been a problem since early adulthood, but was controlled with antacids. 