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Duration of antihypertensive effect of a single daily dose of hydrochlorothiazide
Insights
A single daily dose of hydrochlorothiazide effectively controls hypertension throughout the day. This diuretic regimen is suitable for managing high blood pressure, offering sustained antihypertensive effects.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Hypertension management requires effective antihypertensive agents.
- Short-acting diuretics necessitate understanding their duration of action for optimal dosing.
Purpose of the Study:
- To evaluate the duration of the antihypertensive effect of a single daily dose of hydrochlorothiazide.
- To determine the suitability of hydrochlorothiazide as a once-daily regimen for hypertension therapy.
Main Methods:
- A double-blind, crossover study involving 11 patients with controlled hypertension.
- Patients received hydrochlorothiazide 100 mg daily or placebo for 12 weeks.
- Blood pressure was monitored four times daily across three separate visits.
Main Results:
- Excellent and sustained blood pressure control was observed throughout the day in all patients.
- The single daily dose of hydrochlorothiazide demonstrated a consistent antihypertensive effect.
- Placebo periods confirmed sustained blood pressure reduction after therapy cessation in previously treated patients.
Conclusions:
- A single daily dose of hydrochlorothiazide is an effective and suitable regimen for hypertension therapy.
- The study supports the use of hydrochlorothiazide for sustained, 24-hour blood pressure control.
- Understanding the duration of action is crucial for optimizing diuretic therapy in hypertension.
Abstract:
To assess the duration of antihypertensive effect of a single daily dose of the short-acting diuretic hydrochlorothiazide, a double-blind crossover study was performed in 11 patients previously well controlled with diuretics. Each patient received hydrochlorothiazide 100 mg in the morning for 12 wk and blood pressure were recorded 4 times daily (8 A.M., 12 noon, 4 A.M., and 8 P.M) on 3 separate visits. The crossover design also included a 12-wk placebo period either preceding or following active therapy. Blood pressure control was excellent and sustained throughout the day in all patients studied, indicating that a single daily dose of hydrochlorothiazide is a suitable regimen for hypertension therapy. The use of a placebo period before initiating the trial and during the active part of the trial confirmed the observation that patients who have been adequately treated for long periods will maintain lowered blood pressure for a variable period after stopping therapy.