Renoprotective effect of calcium channel blockers in combination with an angiotensin receptor blocker in elderly patients with hypertension. A randomized crossover trial between benidipine and amlodipine.
Anti-hypertensive medication with an angiotensin II receptor blocker (ARB) is effective in slowing the progression of chronic kidney disease. The present study was designed to investigate whether calcium channel blockers (CCBs) in combination with an ARB differentially affect kidney function. Elderly hypertensive patients with chronic kidney disease (n = 17, 72 +/- 6 years old) were instructed to self-measure blood pressure. They were randomly assigned to receive either benidipine (4-8 mg/day) or amlodipine (5-10 mg/day) combined with olmesartan (10 mg/day). After 3 months, CCBs were switched in each patient and the same protocol was applied for another 3 months. At baseline, significant correlation was obtained between urine albumin (22.8 +/- 16.7 (median +/- median absolute deviation) mg/g creatinine) and self-measured blood pressure (170 +/- 23/87 +/- 10 (mean +/- SD) mmHg, r = 0.65, p < 0.01). Both regimens reduced blood pressure to a similar extent (139 +/- 22/75 +/- 11 mmHg and 133 +/- 17/72 +/- 10 mmHg, respectively; both p < 0.001), while urine albumin decreased only after combination therapy including benidipine (11.7 +/- 6.1 mg/g creatinine, p < 0.05). Benidipine, but not amlodipine, in combination with olmesartan, reduced urinary albumin excretion in elderly hypertensive patients with chronic kidney disease. The results suggest the importance of selecting medications used in combination with ARB in hypertensive patients with chronic kidney disease.
Department of Internal Medicine, Nagoya Kosein Geriatric Hospital, Nagoya, Japan.
Koichi
K
Miyagawa
Yasuaki
Y
Dohi
Ai
A
Nakazawa
Tomonori
T
Sugiura
Sumiyo
S
Yamashita
Koichi
K
Sato
Genjiro
G
Kimura
D000368:Aged; D000369:Aged, 80 and over; D000419:Albuminuria / Q000188:drug therapy; D017311:Amlodipine / Q000008:administration & dosage*; D047228:Angiotensin II Type 1 Receptor Blockers / Q000008:administration & dosage*; D000959:Antihypertensive Agents / Q000008:administration & dosage; D001794:Blood Pressure / Q000187:drug effects; D002121:Calcium Channel Blockers / Q000008:administration & dosage*; D018592:Cross-Over Studies; D004095:Dihydropyridines / Q000008:administration & dosage*; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy* / Q000503:physiopathology / Q000652:urine; D007093:Imidazoles / Q000008:administration & dosage; D008297:Male; D051436:Renal Insufficiency, Chronic / Q000188:drug therapy / Q000517:prevention & control; D013777:Tetrazoles / Q000008:administration & dosage
D047228:Angiotensin II Type 1 Receptor Blockers; D000959:Antihypertensive Agents; D002121:Calcium Channel Blockers; D004095:Dihydropyridines; D007093:Imidazoles; D013777:Tetrazoles; D017311:Amlodipine; C061004:benidipine; C437965:olmesartan