Antihypertensive prescribing--a survey of general practice supervisors and registrars.

BACKGROUND: Hypertension is a common problem in general practice. Prescribing guidelines vary, but generally favour thiazide diuretics as first line treatment for uncomplicated essential hypertension. This study looks at antihypertensive prescribing habits of primary care practitioners and their knowledge of prescribing guideline recommendations.
METHODS: General practitioner supervisors and registrars from the Sydney Institute of General Practice Education and Training completed an online survey between April and July 2007. In response to a clinical vignette, participants indicated which agent they would use as first line therapy. In addition, they described what they knew about existing prescribing guidelines for essential hypertension.
RESULTS: One hundred and thirty-eight surveys were sent and 31 were returned completed. Angiotensin converting enzyme inhibitors were favoured as first line agents. Most believed current guidelines recommend more than one class of antihypertensive agent as appropriate for the initiation of single agent therapy. Angiotensin converting enzyme inhibitors were nominated most often as first line treatments recommended by guidelines. DISCUSSION: The study is limited by a small sample size, a low response rate and the fact that participants all came from a similar location. Prescribing habits in the study group were not consistent with two out of three Australian guidelines on management of hypertension. Further research may allow generalisation to the wider Australian general practice community and indicate underlying reasons for this inconsistency. Hypertension management is an important educational topic for general practice registrars and GPs.