There have been many reports stating that halperidol premedication has been used for sefative and antiemetic effects. Therefore we utilized haloperidol as a premedicant for the purpose of obtaining the above effects. Over a period of one year from march 1978 to February 1979, 0.1mg haloperidol per kilogram of body weight was given to 747 patients. The results were as follows. 1)The extrapyramidal symptioms appeared in children, especially in the 10-year old group. 2) Large doses of haloperidol were more likely to cause to extrapyramidal symptoms than smaller doses(over 0.1mg/kg) 3)The effects of haloperidol lasted for a considerable duration of time after administration, (about 24-48 hous).