Sulpirid was administered in an open clinical trial--150 mg/day for 4 weeks--to 31 patients (15 man and 16 women, mean age 31.5 years, mean duration of complaints 1 month to 6 years) suffering from functional disorders of the digestive system. Their health status was evaluated by a specialist in internal medicine, by a psychiatrist and a self-administered SCL-90 questionnaire before the onset of treatment and after four weeks. In 29 patients the complaints disappeared or improved markedly and this improvement persisted also after discontinuation of the drugs. In the entire group a significant drop of the mean initial intensity of psychopathological feature in all dimensions of the questionnaire occurred; the improvement was more marked in men where the mean baseline values of psychopathology were higher. There was also a significant decline of the mean numbers of positively evaluated items in 9 of 10 dimensions of the questionnaire. The drug was well tolerated by the patients with the exception of one transient allergic skin reaction. So far the exact ratio of improvement of psychopathology as a therapeutic response to sulpirid administration and the placebo effect on the patient's complaints cannot be exactly evaluated. Sulpirid has some advantages, as compared with other psychopharmaceutic preparations used in this indication (e.g. amitriptyline, dosulepine).