Drugs prescribed in outpatients were surveyed for one week in Showa University Hospital. The present study is based on 4, 065 prescriptions in 7, 787 outpatients. From the results of the percentage of prescriptions prescribed in outpatients in each clinic, it was obtained to be 83% in psychiatry-clinic, 72% in urology-clinic, 69% in dermatology-clinic, 64% in internal medicine-clinic, 59% in paediatrics-clinic and these data indicated that outpatients in psychiatry-clinic were depended on drug therapy. The most frequent prescribing drugs in outpatients were sedatives, which were prescribed in all clinical departments. Antiinflammatory drugs, antacid, vitamin which would be commonly prescribed with the other drugs for oral use will be necessary to reevaluate for their therapeutic effects and interactions. The number of prescribing remedies for oral use in outpatients was obtained to increase with increase in age in linear manner in internal medicine for cardiovascular diseases, that is, outpatients under 20 years old were prescribed about 2 or 3 remedies and the number of prescribing remedies was increased in one remedy in every ten years of age and outpatients over 80 years old were prescribed about 8 remedies.