noun Pharmacology.
a substance, C 10 H 16 N 6 S, that is used alone or in combination with antacids to inhibit gastric secretion in the treatment of duodenal ulcers.

1975–80; probably ci-, respelling of cy(ano)-3 + met(hyl) + (guan)idine Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cimetidine (saɪˈmɛtɪdiːn)
a drug used to suppress the formation of acid by the stomach and so to encourage the healing of gastric and duodenal ulcers. Formula: C10H16-N6S

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

cimetidine ci·met·i·dine (sĭ-mět'ĭ-dēn', -dīn')
A histamine antagonist used to treat peptic ulcer and hypersecretory conditions by inhibiting gastric acid secretion.

The American Heritage® Stedman's Medical Dictionary
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Example sentences
Some drugs, such as the ulcer medication cimetidine, can slow the breakdown of benzodiazepine.
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