title: Ambulatory blood pressure comparison of the anti-hypertensive efficacy of fixed combinations of irbesartan/hydrochlorothiazide and losartan/hydrochlorothiazide in patients with mild-to-moderate hypertension.
abstract: This study examined whether the greater anti-hypertensive efficacy of irbesartan monotherapy over losartan monotherapy extends to the respective fixed-dose combinations with hydrochlorothiazide (HCTZ) in patients with mild-to-moderate hypertension. Patients were treated with either irbesartan 150 mg/HCTZ 12.5 mg or losartan 50 mg/HCTZ 12.5 mg over a 4-week period. Twenty-four hour daytime and night-time mean blood pressure (BP), BP load and duration of action were assessed using ambulatory BP monitoring. Both treatment regimens significantly reduced BP from baseline for all efficacy variables assessed. A significant difference was noted in adjusted mean changes from baseline in 24-h ambulatory diastolic BP with irbesartan/HCTZ versus losartan/HCTZ. Reduction in diastolic load was significantly greater with irbesartan/HCTZ than with losartan/HCTZ as was mean ambulatory systolic BP during the last 4 h of the dosing interval. Both regimens were well tolerated, with no significant differences in terms of adverse event profile observed. Irbesartan 150 mg/HCTZ 12.5 mg resulted in greater reductions in ambulatory BP than losartan 50 mg/HCTZ 12.5 mg.
authors.affiliation: Orange County Research Center, Tustin, California 92780, USA. jmneutel@aol.com
authors.forename: J M
authors.initials: JM
authors.lastname: Neutel
authors.forename: D
authors.initials: D
authors.lastname: Smith
mesh_terms: D000328:Adult; D000959:Antihypertensive Agents / Q000627:therapeutic use*; D001713:Biphenyl Compounds / Q000627:therapeutic use*; D018660:Blood Pressure Monitoring, Ambulatory; D004232:Diuretics / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006852:Hydrochlorothiazide / Q000627:therapeutic use*; D006973:Hypertension / Q000188:drug therapy*; D000077405:Irbesartan; D019808:Losartan / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D013599:Systole; D013777:Tetrazoles / Q000627:therapeutic use*; D016896:Treatment Outcome
chemical_list: D000959:Antihypertensive Agents; D001713:Biphenyl Compounds; D004232:Diuretics; D013777:Tetrazoles; D006852:Hydrochlorothiazide; D000077405:Irbesartan; D019808:Losartan