Willingness to pay for angiotensin-converting enzyme inhibitors as self-medication for primary prevention of stroke in Japan

Masayuki Hashiguchi, Eriko Watanabe, Takeshi Chiyoda, Shin Irie, Tatsuo Kurokawa, Mayumi Mochizuki

Research output: Contribution to journalArticle

Abstract

Background : Lifestyle-related diseases are increasing in Japan, and the national medical expenditure is increasing. Converting prescription drugs to over-the-ounter (OTC) drugs would appear to be one solution to cut expenditure. The willingness to pay (WTP) of the Japanese public for OTC imidapril, an angiotensin-converting enzyme (ACE) inhibitor, as a healthcare-related item has not been evaluated. Objective : To measure the value of OTC imidapril as a health care-related item by investigating the public's WTP as self-medication for primary prevention of stroke, assuming that ACE inhibitors are switched from prescription-only to OTC status. Methods : A questionnaire was distributed among healthy individuals engaged in various jobs in office buildings (including a clinic) in Tokyo and Fukuoka, Japan. For the WTP question format, the double-bound dichotomous choice approach was employed. Participants were randomly assigned to 3 groups. Group A was provided with a starting price per month of ¥6,000, group B with ¥8,000, and group C with ¥10,000. Weibull regression analysis was used to investigate factors affecting WTP. Results : The questionnaire survey was completed correctly by 311 individuals (156 men, mean age 50 years), and the mean WTP was ¥7,237 per month. Weibull regression analysis showed that gender significantly affected WTP. The bid acceptance rates differed among the age groups of 20-39 years, 40-64 years, and 65 years. Conclusion : The public's WTP amount was approximately ¥7,000 per month, and the WTP based on the questionnaire responses was about 20% lower than the present cost for physician visits.

Original languageEnglish
Pages (from-to)29-36
Number of pages8
JournalJapanese Journal of Clinical Pharmacology and Therapeutics
Volume44
Issue number1
DOIs
Publication statusPublished - 2013 Jan

Fingerprint

Self Medication
Primary Prevention
Angiotensin-Converting Enzyme Inhibitors
Japan
Stroke
Health Expenditures
Regression Analysis
Nonprescription Drugs
Delivery of Health Care
Prescription Drugs
Tokyo
Prescriptions
Life Style
Age Groups
Physicians
Costs and Cost Analysis
Surveys and Questionnaires
imidapril

Keywords

  • ACE inhibitors
  • Primary prevention
  • Self-medication
  • Stroke
  • Willingness to pay

ASJC Scopus subject areas

  • Pharmacology (medical)
  • Pharmacology

Cite this

Willingness to pay for angiotensin-converting enzyme inhibitors as self-medication for primary prevention of stroke in Japan. / Hashiguchi, Masayuki; Watanabe, Eriko; Chiyoda, Takeshi; Irie, Shin; Kurokawa, Tatsuo; Mochizuki, Mayumi.

In: Japanese Journal of Clinical Pharmacology and Therapeutics, Vol. 44, No. 1, 01.2013, p. 29-36.

Research output: Contribution to journalArticle

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