Which class of drugs is often considered first-line for uncomplicated essential hypertension?

• A. ACE inhibitors
• B. Thiazide diuretics (e.g., chlorthalidone)
• C. Beta-blockers
• D. Calcium channel blockers

Answer: (B)

For uncomplicated essential hypertension, starting therapy with a thiazide diuretic is favored because this class reliably lowers blood pressure and has strong evidence showing a reduction in cardiovascular events, especially stroke. Chlorthalidone, in particular, has a long duration of action and potent effect, which translates into meaningful, long-term risk reductions. They’re also inexpensive and easy to use, making them a practical first option for most patients without other complicating conditions.

Side effects to watch for include increased uric acid (gout risk) and potassium loss, but these can be monitored with routine labs and managed. Other drug classes—ACE inhibitors, beta-blockers, and calcium channel blockers—have important roles and may be preferred in certain comorbidities (diabetes or CKD, coronary disease, etc.), but for uncomplicated hypertension, thiazide diuretics provide the strongest, most consistent cardiovascular risk reduction data and cost-effectiveness as a first-line choice.