The factors related to purchasing over-the-counter medications online

Keiko Kishimoto, Takeshi Yoshida, Noriko Fukushima

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We conducted a Web-based survey of approximately 40 000 Internet users on the purchase of over-the-counter (OTC) medications online in March 2009. The valid response rate was 97.8% and the number of responses was 39 208. The number of people who had purchased OTC medications online was 4 653 (11.9%), prescription medicines 792 (2.0%), and medical contact lenses 1 993 (5.1%). As a result of the multiple logistic regression analysis, independent variables with odds ratios (ORs) >1.5 were experience of purchasing prescription-only medicine online (OR=4.997, 95% CI=4.288-5.824), regular supplement use (OR=2.384, 95% CI=2.233-2.548), experience of purchasing colored contact lenses online (OR=2.206, 95% CI=1.632-2.983), no time to visit drugstores (OR=2.092, 95% CI=1.928-2.270), usage of Web sites of uncertain reliability (OR=1.992, 95% CI=1.857-2.137), and experience of purchasing therapeutic contact lenses online (OR=1.796, 95% CI=1.597-2.020). As some people have purchased prescription-only medicine or medical devices and had problems with drug information sources, the development of awareness of medical and pharmaceutical supplies and health and medical information literacy are key priorities to ensure safe OTC medication sales systems.

Original languageEnglish
Pages (from-to)1127-1136
Number of pages10
JournalYakugaku Zasshi
Issue number9
Publication statusPublished - 2009 Sept


  • Multiple logistic regression
  • Online shopping
  • Over-the-counter medication
  • Web-based survey

ASJC Scopus subject areas

  • Pharmacology
  • Pharmaceutical Science


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