Recently, the number of outpatients who visit the hospital only for the examination is increased in Ofuna Chuo hospital.  It is important that the pharmacists manage the contrast media used to these outpatients for the rational drug therapy.  However, there are a few hospitals where the pharmacists work in the laboratory.  Therefore, we investigated the effect of the providing drug information by pharmacists to the patients received magnetic resonance cholangiopancreatography (MRCP) in the laboratory.  The subjects were consisted of 38 patients who were taken with Bothdel®Oral Solution 10 during receiving MRCP.  The pharmacist instructed the patients about Bothdel®Oral Solution 10 before MRCP.  The percentage of patients who were already treated with the other drugs was 92.0%.  The 4 patients were taken the drugs interacted with Bothdel®Oral Solution 10 and then were able to prevent the drug interaction by the pharmacist.  Also, the patients were taken the questionnaire form about the adverse events of this drug and sent it to the pharmacy by mail after more than 5 days.  As the results, the gastrointestinal symptoms such as a loose stool and a diarrhea were reported 28.5% of the patients.  In addition, as the adverse events other than listed in the package insert, epigastric distress, heaviness of the head and hot flash, were shown in each of a patient, respectively.  In conclusion, it was very important that the pharmacists provide the information of rational use of contrast media to the patients who received examination.