Double-blind, placebo-controlled crossover comparison of five classes of antihypertensive drugs

Journal of Hypertension
Alison J DearyMorris J Brown

Abstract

Hypertension guidelines recommend initial treatment with a beta-blocker or diuretic and adding the other drug where blood pressure is not controlled. We hypothesized that systematic rotation through the major classes of antihypertensive drugs would demonstrate substantial differences in the pattern of an individual patient's response, and suggest a more rational approach to choosing best treatment. Thirty-four young hypertensives (age 28-55, median 47) rotated in a double-blind, Latin-square, crossover fashion through 6 weeks of treatment each with amlodipine, doxazosin, lisinopril, bisoprolol, bendrofluazide and placebo. Blood pressure was measured at each visit. 'Best' drug, defined by efficacy and tolerability, was repeated at the end. Rotation doubled the number of patients reaching target blood pressure (systolic < 140 mmHg) on one drug (P = 0.03). All five drugs were represented among the 'best' drugs. In six patients, the blood pressure on 'best' drug was at least 10 mmHg lower than on any other. Response to the 'best' drug was highly correlated (r = 0.79) with its previous administration. By contrast, there were only weak correlations between responses to pairs of drugs, except for angiotensin-converting enzyme (ACE) in...Continue Reading

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