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Trends in antihypertensive prescribing

A Penrose1, S Dovey, M Tilyard

  • 1Otago Medical School, Dunedin, New Zealand.

The New Zealand Medical Journal
|January 26, 1996
PubMed
Summary

Prescribing trends for antihypertensive medications show that patients switching drug classes incurred higher costs. While clinical reasons drove these changes, improved patient health outcomes remain unconfirmed.

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Area of Science:

  • Pharmacoeconomics
  • Cardiovascular Medicine
  • Health Services Research

Background:

  • Antihypertensive medication prescribing is a cornerstone of cardiovascular disease management.
  • Understanding expenditure trends associated with different prescribing patterns is crucial for healthcare systems.

Purpose of the Study:

  • To analyze trends in antihypertensive prescribing over a three-year period.
  • To quantify changes in patient and government expenditure linked to antihypertensive medication class changes.

Main Methods:

  • Retrospective analysis of computerized records for 16,069 patients across six general practices (1991-1993).
  • Identification of patients on antihypertensives for all three years, categorizing them by medication class adherence or change.
  • Evaluation of direct costs associated with prescribing decisions.

Main Results:

  • Of 914 patients on antihypertensives throughout the study, 36.7% switched medication classes.
  • Medication class changes were clinically indicated in 98% of cases examined.
  • Expenditure remained stable for patients on the same medication class, but increased by 20.6% for those who switched.

Conclusions:

  • Increased antihypertensive medication expenditure in this cohort was primarily driven by patients switching drug classes.
  • Despite clinical indications for medication changes, improved patient health outcomes were not definitively established due to a lack of objective indicators.

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