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Off-label prescribing of medications is common, Canadian study suggests

Date:
April 16, 2012
Source:
JAMA and Archives Journals
Summary:
A study evaluating off-label prescribing of medications in a primary care network in Canada suggests the practice is common, although it varies by medication, patient and physician characteristics, according to a new report.

A study evaluating off-label prescribing of medications in a primary care network in Canada suggests the practice is common, although it varies by medication, patient and physician characteristics, according to a report published Online First by Archives of Internal Medicine, a JAMA Network publication. The report is part of the journal's Health Care Reform series.

Off-label prescribing is the practice of using prescription medications for indications that have not received regulatory approval. The practice is suspected to be a factor of preventable adverse medication events, the authors write in their study background.

Tewodros Eguale, M.D., M.Sc., of McGill University, Montreal, Canada, and colleagues used the Medical Office of the XXI Century primary care electronic health record network research program in Quebec to examine off-label use. A total of 113 primary care physicians wrote 253,347 electronic prescriptions for 50,823 patients from January 2005 through December 2009.

Overall, 11 percent of medications were prescribed for an off-label indication and 79 percent of off-label use lacked strong scientific evidence, the results indicate. The authors note the magnitude of off-label use was less than in a U.S. study.

In the present study, the highest proportion of off-label prescribing involved central nervous system medications (26.3 percent), anti-infective agents (17.1 percent) and ear-nose-throat medications (15.2 percent), according to the study results.

The results indicate that medications with three or four approved indications were associated with lower off-label use compared to those with one or two approved indications. Medications approved after 1995 also were associated with lower off-label use than those approved before 1981. Physicians with high scores on evidence-based practice were less likely to prescribe off-label.

"In conclusion, our findings indicate that off-label prescribing is common in primary care and varies by drug class, the number of approved indications for the drug, the age of the drug, patients' sex and physicians' attitude toward evidence-based medicine," the authors conclude. "Electronic health records can be used to document treatment indication at the time of prescribing and may pave the way for enhanced postmarketing evaluation of drugs if linked to treatment outcomes."


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Tewodros Eguale, David L. Buckeridge, Nancy E. Winslade, Andrea Benedetti, James A. Hanley, Robyn Tamblyn. Drug, Patient, and Physician Characteristics Associated With Off-label Prescribing in Primary Care. Arch Intern Med, April 16, 2012 DOI: 10.1001/archinternmed.2012.340

Cite This Page:

JAMA and Archives Journals. "Off-label prescribing of medications is common, Canadian study suggests." ScienceDaily. ScienceDaily, 16 April 2012. <www.sciencedaily.com/releases/2012/04/120416165649.htm>.
JAMA and Archives Journals. (2012, April 16). Off-label prescribing of medications is common, Canadian study suggests. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2012/04/120416165649.htm
JAMA and Archives Journals. "Off-label prescribing of medications is common, Canadian study suggests." ScienceDaily. www.sciencedaily.com/releases/2012/04/120416165649.htm (accessed July 31, 2014).

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