Successful implementation of a P&T-approved therapeutic interchange program of angiotensin II receptor blockers in a medical center in Taiwan

Yen Ying Lee, Paul Hsiao, You Meei Lin, Yu Hsuan Yen, Hsiang Yin Chen

Research output: Contribution to journalArticle

2 Citations (Scopus)


Objective: Therapeutic interchange is not a common practice in the medical society in Asia. We used clinic blood pressure readings, patients' tolerance, and cost saving as measures to evaluate the impact of a therapeutic interchange program implemented at a medical center in Taiwan. Methods: Taipei Medical University-Wan Fang Hospital initiated a therapeutic interchange program involving angiotensin II receptor blockers (ARBs). Data were retrospectively collected for 444 outpatients who were converted from other ARBs to candesartan. Evaluation of therapeutic efficacy, adverse effects associated with therapy, and drug costs was conducted before and after the program implementation. Results: Patients whose treatment was converted to candesartan experienced no statistically significant differences in blood pressure, and the average number of antihypertensive agents used per patient remained unchanged. A direct cost savings of US$62,237 was estimated for the 444 patients studied. Only 3.15% of the patients developed adverse drug reactions potentially related to candesartan, and none required hospitalization. Conclusions: Based on the results of this retrospective chart review, the present ARB therapeutic interchange program was successfully developed and implemented. This is the first study to establish the positive impact of a well-run ARB therapeutic interchange program in Taiwan.

Original languageEnglish
JournalValue in Health
Issue number1 SUPPL.
Publication statusPublished - Jan 2012



  • angiotensin II receptor blockers
  • candesartan
  • hypertension
  • therapeutic interchange

ASJC Scopus subject areas

  • Health Policy
  • Public Health, Environmental and Occupational Health

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