Cimetidine (Inn:cimetidine), also known as methyl cyanide, Thai stomach, cimetidine or the United States, is a group of amine H2 receptor impedance, can be applied to stomach control of gastric acid secretion. Often used for heartache and peptic ulcer. In 1979, GlaxoSmithKline was branded Tagamet (sometimes tagamet HB or Tagamet HB200) to the market.