Validity of a nationwide medication record system in the Netherlands.

Background In the Netherlands, a nationwide Medication Record System based on pharmacy dispensing data is used to obtain information about patients' actual medication use. However, it is not clear to what extent the information of the Nationwide Medication Record System corresponds to the medication information obtained with the Best Possible Medication History. Objective To examine the validity of medication dispensing records collected from the Nationwide Medication Record System by comparing them to the Best Possible Medication History. Method An observational study was performed. Patients from several hospital departments were included at admission. To obtain the Best Possible Medication History, pharmacy technicians performed medication reconciliation at admission, using dispensing records from the Nationwide Medication Record System and information from the patient himself. Primary outcome is percentage of patients with no discrepancies between the Nationwide Medication Record System and the Best Possible Medication History. Descriptive analysis was used. Results Eighty-two patients were approached and 66 (80%) were included, with in total 478 medicines in the Best Possible Medication History. Seventeen percent of the patients had no discrepancies and 33% (n = 156) of the medication records contained a discrepancy between the Nationwide Medication Record System and the Best Possible Medication History. Most common type of discrepancy was omission (44%). Conclusion Even with a Nationwide Medication Record System medication reconciliation with the patient remains essential to obtain complete information about patient's actual medication use.