In last issue's column, we discussed the case of JG, a patient with newly diagnosed hypertension (HTN). Upon diagnosis, consistent with national guidelines (ie, the Eighth Joint National Committee), JG was started on a thiazide diuretic, namely chlorthalidone. Over the next several months, despite continual efforts to reduce his weight, control his salt intake, and increase his activity level, JG's blood pressure (BP) remained elevated. Accordingly, he was started on amlodipine, which was titrated to 10 mg daily, and lisinopril, which was titrated to 40 mg daily. Despite both the pharmacologic and nonpharmaco-logic efforts, JG's BP remained elevated at 155/91 mm Hg. What is the next best step for JG to control his BP?
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