H2 antagonist H2受体阻抗剂
(重定向自H2RA)
H2 antagonists, also called H2 blockers, are a class of medications that block the action of histamine at the histamine H2 receptors of the parietal cells in the stomach. This decreases the production of stomach acid. H2 antagonists can be used in the treatment of dyspepsia, but have been surpassed by the more effective proton pump inhibitors. They are also used to treat peptic ulcer disease and gastroesophageal reflux disease.