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J Am Med Inform Assoc doi:10.1136/amiajnl-2011-000205
  • Research and applications

Errors associated with outpatient computerized prescribing systems

Press Release
  1. Eric G Poon2,3,5
  1. 1Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
  2. 2Harvard Medical School, Boston, Massachusetts, USA
  3. 3Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
  4. 4CVS Pharmacy, Woonsocket, Rhode Island, USA
  5. 5Partners Healthcare, Boston, Massachusetts, USA
  1. Correspondence to Dr Karen C Nanji, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA; knanji{at}partners.org
  1. Contributors KCN had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.

  • Received 22 February 2011
  • Accepted 2 May 2011
  • Published Online First 29 June 2011

Abstract

Objective To report the frequency, types, and causes of errors associated with outpatient computer-generated prescriptions, and to develop a framework to classify these errors to determine which strategies have greatest potential for preventing them.

Materials and methods This is a retrospective cohort study of 3850 computer-generated prescriptions received by a commercial outpatient pharmacy chain across three states over 4 weeks in 2008. A clinician panel reviewed the prescriptions using a previously described method to identify and classify medication errors. Primary outcomes were the incidence of medication errors; potential adverse drug events, defined as errors with potential for harm; and rate of prescribing errors by error type and by prescribing system.

Results Of 3850 prescriptions, 452 (11.7%) contained 466 total errors, of which 163 (35.0%) were considered potential adverse drug events. Error rates varied by computerized prescribing system, from 5.1% to 37.5%. The most common error was omitted information (60.7% of all errors).

Discussion About one in 10 computer-generated prescriptions included at least one error, of which a third had potential for harm. This is consistent with the literature on manual handwritten prescription error rates. The number, type, and severity of errors varied by computerized prescribing system, suggesting that some systems may be better at preventing errors than others.

Conclusions Implementing a computerized prescribing system without comprehensive functionality and processes in place to ensure meaningful system use does not decrease medication errors. The authors offer targeted recommendations on improving computerized prescribing systems to prevent errors.

Footnotes

  • Funding This project was supported by grant number U18HS016970 from the Agency for Healthcare Research and Quality (Rockville MD) and in part by a grant from the Harvard Risk Management Foundation, Cambridge, Massachusetts.

  • Competing interests None.

  • Ethics approval Ethics approval was provided by Partners Human Research Committee.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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