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Doxazosin: a study in a cohort of patients with hypertension in general practice--an interim report
1Symons Medical Centre, Berkshire, England.
Insights
Doxazosin effectively lowered blood pressure and improved cholesterol levels in hypertensive patients. This alpha-blocker demonstrated a significant reduction in coronary heart disease risk, enhancing cardiovascular health.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Hypertension is a prevalent condition requiring effective management.
- Many hypertensive patients have dyslipidemia, increasing cardiovascular risk.
Purpose of the Study:
- To evaluate the safety and efficacy of doxazosin in a large cohort of general practice hypertensive patients.
- To assess the impact of doxazosin on blood pressure, heart rate, and lipid profiles.
Main Methods:
- A cohort of 4027 hypertensive patients was studied.
- Patients received doxazosin therapy, with blood pressure and lipid levels monitored.
- Adverse events and treatment discontinuations were recorded.
Main Results:
- Doxazosin reduced mean blood pressure by 22/15 mm Hg and heart rate by 1 beat/min.
- Treatment discontinuation due to adverse events occurred in 5.8% of patients.
- Significant improvements were observed in total cholesterol, LDL, triglycerides, HDL, and HDL:total cholesterol ratio, potentially reducing 10-year CHD risk by 20.4%.
Conclusions:
- Doxazosin is a safe and effective treatment for hypertension, offering significant cardiovascular benefits beyond blood pressure control.
- The drug positively impacts lipid profiles, contributing to a reduced risk of coronary heart disease.
Abstract:
The objective of this study was to assess the safety and efficacy of doxazosin in a substantial cohort of hypertensive patients drawn from general practice. A total of 4027 patients entered the study, 1472 of whom (36.6%) were untreated hypertensive patients. Patients were not advised to change diet, smoking habit, or life-style during the study. Twenty-one percent were cigarette smokers, and concurrent diabetes was present in 2.3%. Baseline blood cholesterol exceeded 200 mg/dl (5.2 mmol/L) in 90% and 250 mg/dl (6.5 mmol/L) in 56% of patients. The mean decrease in blood pressure produced by doxazosin was 22/15 mm Hg after 10 weeks of therapy; there was a mean decrease in heart rate of 1 beat/min. The mean maintenance dose for all patients was 3.1 mg/day. Side effects considered related or possibly related to treatment were reported in 705 patients. Treatment was discontinued in 233 patients (5.8%) because of adverse events related or possibly related to treatment with doxazosin. Doxazosin produced a significant (p less than 0.001) decrease in total cholesterol, low-density lipoprotein cholesterol, and triglyceride levels and a significant increase in high-density lipoprotein cholesterol and the ratio of high-density lipoprotein:total cholesterol. The potential reduction in 10-year coronary heart disease risk (according to the Framingham equation) was calculated to be 20.4%.
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