Discrepancies between medication records of anticoagulation clinics and pharmacy records

Abstract

PURPOSE: To determine whether there were discrepancies between with coumarin anticoagulants interacting medications recorded in medical files of anticoagulation clinics (AC-records) and computerized records of community pharmacies (pharmacy records). METHODS: A descriptive study was conducted at two Dutch anticoagulation clinics (AC's). Records of with coumarin anticoagulants interacting drugs at the AC's were compared with the pharmacy records. A drug registered in the pharmacy records but not in the AC-records, was recorded as a discrepancy, while a drug registered in AC-records as well as in pharmacy records, was recorded as a match. RESULTS: Of the 117 identified interacting drugs registered in pharmacy records 32 (27%) were not registered in the AC-records. In four out of seven patients of whom the use of a pharmacokinetically interacting drug was not registered in the AC-records, several INR-values exceeded the upper therapeutic range. CONCLUSION: This study demonstrates that a substantial percentage of drugs of which an interaction with coumarin anticoagulants can be expected, is not registered in the medical files of anticoagulation clinics