甲氰咪胍系组胺H_2受体括抗剂,有较强的抑制胃酸分泌作用,被广泛用于胃酸分泌增多性疾病和上消化道出血的治疗。但随着临床的广泛应用,副作用也有增加的趋势。比较常见的副作用如腹泻、腹胀、口干、口苦、头晕、头痛、嗜睡等。据报导有出现烦燥、情绪多变、幻觉、定向障碍等 Cimetidine is a histamine H_2 receptor antagonist, has a strong inhibitory effect on gastric acid secretion, is widely used in the treatment of gastric acid secretion increased diseases and upper gastrointestinal bleeding. However, with the widespread use of clinical, side effects also have an increasing trend. More common side effects such as diarrhea, bloating, dry mouth, bitter mouth, dizziness, headache, drowsiness and so on. It has been reported that irritability, emotional change, hallucinations, disorientation and so on