西咪替丁(ｃｉｍｅｔｉｄｉｎｅ)又名甲氰咪胍,为Ｈ2受体阻断药,对Ｈ2受体有高度选择性,对Ｈ1受体以及其它自身活性物质和神经递质受体几无作用。毒性低,用于治疗上消化道出血。十二指肠溃疡和胃溃疡,预防与治疗应激性溃疡等均有效,且疗效确切。不良反应轻微,可出现轻度头痛,眩 Cimetidine (Cimetidine), also known as cimetidine, is a H2 receptor blocker that is highly selective for H2 receptors and has little effect on H1 receptors and other self-reactive substances and neurotransmitter receptors. Low toxicity for the treatment of upper gastrointestinal bleeding. Duodenal ulcer and gastric ulcer, prevention and treatment of stress ulcer are effective, and the exact effect. Minor adverse reactions, there may be mild headache, dizziness