Should thiazide diuretics be given as first line antihypertensive therapy or in addition to other medications?

Area of Science:

• Cardiology
• Pharmacology
• General Practice

Background:

• Diuretics are commonly recommended as a first-line antihypertensive therapy.
• Concerns exist regarding potential delays in blood pressure control and cost-effectiveness with diuretic-initiated treatment.

Purpose of the Study:

• To evaluate the clinical practice effects of initiating antihypertensive therapy with diuretics compared to other single-agent medications.
• To assess blood pressure control and medication requirements in patients starting treatment with chlorthalidone versus other antihypertensives.

Main Methods:

• A randomized trial involving 2,409 hypertensive patients was conducted by general practitioners.
• Patients were assigned to initiate treatment with chlorthalidone (group D) or another single antihypertensive medication (group A) for at least 2 years.
• Outcomes included blood pressure control rates and the number of prescribed medications.

Main Results:

• Optimal blood pressure control rates were similar between the chlorthalidone group (65.0%) and the other-medication group (64.0%).
• Patients in the chlorthalidone group were prescribed a slightly higher average number of medications (2.3 vs. 2.1).
• The chlorthalidone group showed increased use of beta-blockers (27.1% vs. 14.9%).

Conclusions:

• Initiating antihypertensive therapy with diuretics may necessitate the addition of other medications for effective blood pressure management.
• While diuretic-initiated therapy did not show inferior blood pressure control, it was associated with a higher likelihood of requiring multiple drug additions.