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Usage patterns of over-the-counter phenazopyridine (pyridium)
Chih-Wen Shi1, Steven M Asch, Eve Fielder
1University of California-Los Angeles, Departments of Family Medicine, Los Angeles, Calif. 90095, USA. cwshi@mednet.ucla.edu
Journal of General Internal Medicine
|April 24, 2003
Summary
Many consumers inappropriately use over-the-counter (OTC) phenazopyridine, a urinary analgesic, and substitute it for medical care. Improving public knowledge about reclassified drugs is crucial to mitigate this issue.
Area of Science:
- Pharmacology
- Public Health
- Consumer Health
Background:
- Over-the-counter (OTC) availability of formerly prescription medications like phenazopyridine raises questions about appropriate consumer use.
- Understanding how the public utilizes these reclassified drugs is essential for public health initiatives.
Purpose of the Study:
- To investigate the extent of inappropriate use and substitution of OTC phenazopyridine for professional medical care among consumers.
- To identify factors associated with the inappropriate use and substitution of OTC phenazopyridine.
Main Methods:
- A cross-sectional survey was conducted with 434 purchasers of OTC phenazopyridine in Los Angeles retail pharmacies.
- Participants completed an anonymous questionnaire assessing contraindications, concurrent provider evaluation, and knowledge of the drug's action.
- Inappropriate use was defined by medical contraindications or lack of concurrent provider evaluation/antibiotic treatment.
Main Results:
- 51% of respondents reported inappropriate use of OTC phenazopyridine, and 38% substituted it for medical care.
- Factors associated with inappropriate use included limited time to see a provider and advice from friends/family.
- Incorrect knowledge about phenazopyridine's mechanism of action significantly increased the odds of inappropriate use and substitution.
Conclusions:
- Inappropriate use and substitution of OTC phenazopyridine for medical care are prevalent among consumers.
- Educational interventions to improve public understanding of reclassified medications are recommended to address this public health concern.