A noninferiority comparison of valsartan/hydrochlorothiazide combination versus amlodipine in black hypertensives.
The objective of the study was to demonstrate that reduction in mean 24-hour diastolic blood pressure with 160 mg valsartan and 12.5 mg hydrochlorothiazide was not inferior to 10 mg amlodipine in hypertensive blacks. A total of 482 blacks with stage 1 and stage 2 hypertension (mean seated blood pressure 140 to 180/90 to 110 mm Hg) were enrolled in a double-blind, randomized, prospective study. After a placebo run-in period, patients were randomized to 160 mg valsartan or 5 mg amlodipine for 2 weeks, then force-titrated to 160 mg valsartan and 12.5 mg hydrochlorothiazide or 10 mg amlodipine for an additional 10 weeks. Blood pressure was assessed by 24-hour ambulatory blood pressure monitoring. Other assessments included quality of life, peripheral edema, and safety. Noninferiority of valsartan/hydrochlorothiazide to amlodipine was demonstrated by comparable reductions in mean 24-hour diastolic blood pressure with both treatments (-10.2+/-8.6 mm Hg versus -9.1+/-8.3 mm Hg, respectively; P<0.001 for noninferiority), as well as in mean 24-hour systolic blood pressure (-15.9+/-12.1 mm Hg versus -14.5+/-12.2 mm Hg; P<0.001 for noninferiority). The proportion of patients reporting adverse events and the incidence of most events were similar in both treatment groups, although more patients treated with amlodipine reported peripheral edema (5.8% versus 1.7%; P=0.03) and joint swelling (2.9% versus 0%; P=0.008) compared with valsartan/hydrochlorothiazide. We conclude that a starting dose of valsartan/hydrochlorothiazide (160/12.5 mg) is as effective as high-dose amlodipine (10 mg) in reducing blood pressure in blacks with stage 1 and stage 2 hypertension, and valsartan/hydrochlorothiazide is better tolerated.
Weir
Matthew R
MR
Division of Nephrology, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA. mweir@medicine.umaryland.edu
Ferdinand
Keith C
KC
Flack
John M
JM
Jamerson
Kenneth A
KA
Daley
William
W
Zelenkofske
Steven
S
D000328:Adult; D000368:Aged; D017311:Amlodipine / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D047228:Angiotensin II Type 1 Receptor Blockers / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D044383:Black People; D001794:Blood Pressure / Q000187:drug effects; D002121:Calcium Channel Blockers / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D004232:Diuretics / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006852:Hydrochlorothiazide / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D006973:Hypertension / Q000188:drug therapy* / Q000208:ethnology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013777:Tetrazoles / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D016896:Treatment Outcome; D014633:Valine / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D000068756:Valsartan
D047228:Angiotensin II Type 1 Receptor Blockers; D002121:Calcium Channel Blockers; D004232:Diuretics; D013777:Tetrazoles; D006852:Hydrochlorothiazide; D017311:Amlodipine; D000068756:Valsartan; D014633:Valine