Background
: If two or more doctors prescribe for one patient, each doctor must be careful to minimize the number of drugs and the frequency of admistration, and also be careful to avoid duplicating drugs, The purpose of this study is to evaluate the appropri-ateness of prescription for the patient who visits two or more doctors.

Methods : In a tertiary hospital, outpatients who received prescriptions simultaneously from two or more doctors were selected, and the number of drugs, the frequency of admi-stration and duplication of drugs were evaluated.

Results : The number of eligible patents was 887. The number of drugs was 5.2 for pa-tients who visited 2 doctors, and 8.1 for patients who visited 3 doctors. 13% of patients who visited 2 doctors received more than 8 drugs, and 32.6% of patients who visited 3 doctors received more than 10 drugs. The frequency of administration per day was 3.7 for patients who visited 2 doctors, and 5.0 for patients who visited 3 doctors. 12% of patients who visited 2 doctors had to take drug more time 6 times a day. 9.2% of total patients recei-ved duplicated drugs. The duplication of drugs was more frequent among patients who vis-ited 2 doctors than who visited 3 doctors.

Conclusion : For the patients who visited two or more doctors, the number of drugs and frequency of admistration was inappropriate and duplication for drugs was found, therefore the doctors should make more efforts to avoid inappropriate prescription.