the safety and efficacy of sustained-release diltiazem , 120 to 180 mg twice daily , was compared with those of hydrochlorothiazide , 25 to 50 mg twice daily , in 207 patients with mild-to-moderate hypertension ( supine diastolic blood pressure [ bp ] 95 to 114 mm hg ) using a baseline , placebo , parallel-design study protocol .
C0020261
hydrochlorothiazide
C0020538
hypertension