胃镜检查术前，为便于术中对胃、十二指肠观察，多用阿托品0.5～1mg皮下注射，以抑制胃肠蠕动，减少恶心及胃液分泌。但阿托品的副作用较多。青光眼、前列腺肥大等受术者，如病史询问不详，有诱发或加重病情可能。为此，1986年8月起我们采用舌下含化硝苯吡啶（简称N法）代替阿托品（简称A法）检查600余例，取得满意效果。现将N与A法对照观察40例的结果报道如下。 Gastroscopy before surgery, in order to facilitate intraoperative observation of the stomach and duodenum, multi-use atropine 0.5 ~ 1mg subcutaneous injection to inhibit gastrointestinal motility and reduce nausea and gastric secretion. But the side effects of atropine more. Glaucoma, prostatic hypertrophy by surgery, such as medical history unknown, there may be induced or aggravate the condition. To this end, since August 1986 we use sublingual nifedipine (referred to as N method) instead of atropine (referred to as A method) check more than 600 cases, and achieved satisfactory results. The N and A method is now controlled observation of the results of 40 cases reported below.