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Initial treatment of the young hypertensive: thiazide diuretic or beta-adrenoreceptor-blocking agent in a single
Insights
Beta-blockers effectively lowered blood pressure in young men with essential hypertension, outperforming a thiazide diuretic. These beta-adrenoreceptor blockers demonstrated efficacy even in single daily doses.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Essential hypertension is a common condition in young males.
- Accurate blood pressure monitoring is crucial for effective treatment.
Purpose of the Study:
- To compare the efficacy of beta-adrenoreceptor blockers versus a thiazide diuretic in lowering blood pressure.
- To assess the effectiveness of different dosing frequencies for beta-blockers.
Main Methods:
- Nine young males with essential hypertension self-monitored blood pressure at home.
- Patients received propranolol, metoprolol, prindolol, or methyclothiazide over defined treatment periods.
- Mean blood pressure was calculated from 14-day readings.
Main Results:
- Propranolol and prindolol significantly reduced mean blood pressure, while methyclothiazide did not.
- No significant difference in blood pressure reduction was observed with varying doses or frequencies of propranolol, metoprolol, and prindolol.
- Beta-blockers were more effective than methyclothiazide in lowering blood pressure.
Conclusions:
- Beta-adrenoreceptor blockers are more effective than thiazide diuretics for essential hypertension in young males.
- Single daily doses of beta-blockers can be effective in managing blood pressure.
Abstract:
1. Nine men aged 20-33 years with essential hypertension measured their own blood pressure at home, lying and standing, three times daily, under conditions of everyday living. The last 14 days' readings (eighty-four observations) from control and treatment periods of at least 4 weeks' duration were used to calculate mean pressures. 2. In eight patients, propranolol (40 mg thrice daily with meals) significantly lowered "mean blood pressure" (diastolic+1/3[systolic-diastolic]) but methyclothiazide (5 mg with breakfast) did not. In five subjects, prindolol (5 mg thrice daily with meals) significantly lowered "mean blood pressure" but methyclothiazide (5 mg with breakfast) did not. 3. In six subjects there was no significant difference between "mean blood pressure" when taking propranolol doses 120 mg with breakfast, 60 mg with breakfast and with the evening meal, and 40 mg with each meal. In five subjects there was no significant difference between "mean blood pressure" when taking metoprolol 200 mg with breakfast and 100 mg with breakfast and with the evening meal. In four subjects there was no significant difference between "mean blood pressure" when taking prindolol 30 mg with breakfast, 15 mg with breakfast and with the evening meal, and 10 mg with each meal. 4. In young males with essential hypertension, beta-adrenoreceptor blockers were more effective than a thiazide diuretic in lowering blood pressure, and were effective in a single daily dose.