ArticleActa Cardiologica Sinica2013
Effect of 8-Week Combination Therapy with an Extended-Release α1-Blocker (Bunazosin or Doxazosin) in Inadequate Responders to an Angiotensin II Antagonist (Valsartan) in Patients with Stage 1 or 2 Essential Hypertension.
Article in Acta Cardiologica Sinica, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundGiven the favorable impact of α1-blockers on lipid and glucose metabolism, this study was designed to compare the efficacy of two extended-release α1-blockers (bunazosin and doxazosin) as an add-on treatment in subjects with stage 1 or 2 essential hypertension which was inadequately controlled by valsartan 80 mg/day.
methodsAfter a 5-week treatment of valsartan monotherapy, subjects with inadequately controlled hypertension were randomized to receive either extended-release bunazosin (n = 47) or doxazosin (n = 46) after breakfast for 8 weeks. Office sitting blood pressure (BP), 24-hour ambulatory BP, and metabolic profiles were measured at baseline, start of study drug, and study end.
resultsIn the intention-to-treat population (n = 93), the average daily doses of bunazosin and doxazosinwere 2.8 mg and 3.6 mg, respectively. The two add-on treatments achieved significant and similar BP reductions from monotherapy (bunazosin, 13.2/9.3 mmHg; doxazosin, 9.2/8.5 mmHg, all p < 0.001). However, in patients with stage 2 hypertension, patients randomized to the bunazosin group, compared to those in the doxazosin group, achieved a significantly greater reduction in sitting systolic BP (14.4 ± 8.1 vs. 6.6 ± 13.8 mmHg, p = 0.015). In addition, patients who received bunazosin had significant changes in night-day systolic and diastolic BP ratios compared with those who received doxazosin (-0.02 vs. 0.02, p = 0.04 and 0 vs. 0.04, p = 0.04). No significant changes in metabolic profiles were observed in both add-on groups. Both drugs were well-tolerated, but adverse events related to the study drugs were marginally more frequent in the doxazosin group than in the bunazosin group (20% vs. 6%, p = 0.058).
conclusionsBoth extended-release bunazosin and doxazosinwerewell-tolerated and similarly effective as add-on therapy in hypertensive patients uncontrolled by valsartan monotherapy. However, add-on treatment with bunazosin seemed to be associated with favorable night-day BP ratio and greater sitting systolic BP reductions in stage 2 hypertensive patients. KEY WORDS: Combination therapy; Hypertension; α1-blocker.
Identifiers
27122680PMC4804956W2106896980What OpenQuestion holds
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