title: A randomized, double-blind, four-arm parallel-group study of the efficacy and safety of azelnidipine and olmesartan medoxomil combination therapy compared with each monotherapy in Japanese patients with essential hypertension: the REZALT study.
abstract: A 12-week randomized, double-blind, four-arm parallel-group, comparative study was conducted in patients with essential hypertension to evaluate the antihypertensive effect and safety of combination therapy with olmesartan medoxomil (OLM, an angiotensin-receptor blocker) 20 mg plus azelnidipine (AZL, a long-acting dihydropyridine calcium channel blocker) 16 mg, (O/A (20/16)), or OLM 10 mg/AZL 8 mg (O/A (10/8)) compared with those of monotherapy with OLM 20 mg (OLM (20)) or AZL 16 mg (AZL (16)). The change from baseline to week 12 in seated blood pressure (SeBP) was -23.6/-14.2 mm Hg (systolic/diastolic BP) in the O/A (20/16) group, and -20.3/-13.0 mm Hg in the O/A (10/8) group, which was a significantly greater reduction in SeBP than in the monotherapy groups (-15.7/-9.9 mm Hg in OLM (20); -15.0/-9.4 mm Hg in AZL (16)). The change from baseline in 24-h ambulatory BP was also significantly greater in the O/A (20/16) and O/A (10/8) combination groups (-22.1/-13.5 and -18.2/-10.6 mm Hg, respectively) than in the OLM (20) and AZL (16) monotherapy groups (-12.1/-6.9 and -12.0/-6.9 mm Hg). The proportion of patients achieving the SeBP goal (<130/85 mm Hg for normal BP or <140/90 mm Hg for high-normal BP) was significantly higher in the O/A (20/16) combination group than in the monotherapy groups. The incidence of adverse events was similar in the O/A combination groups and the monotherapy groups. These results showed that combination therapy with O/A was well tolerated and exerted a stronger antihypertensive effect compared with monotherapy with OLM or AZL in patients with essential hypertension.
authors.affiliation: Osaka General Medical Center, Osaka Prefectural Hospital Organization, Japan. ogiharat@opho.jp
authors.forename: Toshio
authors.initials: T
authors.lastname: Ogihara
authors.forename: Takao
authors.initials: T
authors.lastname: Saruta
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Shimada
authors.forename: Kizuku
authors.initials: K
authors.lastname: Kuramoto
mesh_terms: D000368:Aged; D047228:Angiotensin II Type 1 Receptor Blockers / Q000008:administration & dosage* / Q000009:adverse effects; D044466:Asian People; D001383:Azetidinecarboxylic Acid / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives*; D018660:Blood Pressure Monitoring, Ambulatory; D002121:Calcium Channel Blockers / Q000008:administration & dosage / Q000009:adverse effects; D004095:Dihydropyridines / Q000008:administration & dosage* / Q000009:adverse effects; D004311:Double-Blind Method; D004357:Drug Synergism; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis / Q000188:drug therapy*; D007093:Imidazoles / Q000008:administration & dosage* / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D000068557:Olmesartan Medoxomil; D013777:Tetrazoles / Q000008:administration & dosage* / Q000009:adverse effects; D016896:Treatment Outcome
chemical_list: D047228:Angiotensin II Type 1 Receptor Blockers; D002121:Calcium Channel Blockers; D004095:Dihydropyridines; D007093:Imidazoles; D013777:Tetrazoles; D001383:Azetidinecarboxylic Acid; D000068557:Olmesartan Medoxomil; C061679:azelnidipine