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Trial of Combination of Guanethidine and Oxprenolol in Hypertension

Overview
Journal Br Med J
Specialty General Medicine
Date 1976 Apr 17
PMID 773486
Citations 9
Authors
R M Pearson
M R Bending
C J Bulpitt
C F George
D R Hole
F M Williams
A M Breckenridge
Affiliations
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Abstract

Thirteen hypertensive patients entered a double-blind crossover trial of guanethidine and oxprenolol in combination. In nine patients who completed the trial there was an additive effect on blood pressure, but the combination had a smaller effect on heart rate than was expected from the individual effects, and side effects were not increased. During treatment with oxprenolol the plasma potassium concentration rose from 3.6 mmol (mEq)/1 to 3.9 mmol (mEq)/1. No correlation was found between the plasma oxprenolol concentration and changes in blood pressure or response to injected isoprenaline, but measurements of plasma oxprenolol concentrations were of value in determining compliance with the protocol.

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