Abstract
Hypertension (HTN) affects an estimated 76.4 million US adults. Despite improvements in blood pressure (BP) control rates and the availability of effective antihypertensive agents, only 50% of these individuals achieve BP control. It is now recognized that many patients will require ≤ 2 antihypertensive agents to achieve BP control. Both the current US and reappraisal of the 2007 European guidelines include dual-combination regimens among recommended treatments for initial HTN therapy. For patients requiring 3 drugs, the combination of agents with complementary mechanisms of action (ie, renin-angiotensin-aldosterone system blocker, calcium channel blocker, and diuretic) has been recognized as rational and effective. Three single-pill triple-drug combinations have recently been approved for use in HTN in the United States: valsartan (VAL)/amlodipine (AML)/hydrochlorothiazide (HCTZ); olmesartan medoxomil (OM)/AML/HCTZ; and aliskiren (ALI)/VAL/HCTZ. Triple-combination regimens have resulted in a greater proportion of patients achieving BP control compared with dual-combination regimens, with significantly lower BP levels documented after only 2 weeks at maximum doses. Single-pill combinations offer convenience to address barriers to BP control such as poor adherence to therapy and therapeutic inertia. Additional benefits of combining antihypertensive agents from different classes include improved efficacy, safety, and reduction of cardiovascular risk. In patients with essential HTN for whom dual therapy is inadequate, single-pill triple-drug therapy can offer a simplified and effective treatment strategy.
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