Medical Dictionary

H2 antagonist

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noun \-ˈtü-\
variants: or

H2 receptor antagonist

also

H2 blocker

Medical Definition of H2 antagonist

  1. :  a drug (as cimetidine, famotidine, nizatidine, or ranitidine) that reduces or inhibits the secretion of gastric acid by binding competitively with histamine to H2 receptors on cell membranes


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