Two groups of patients will be formed, who wil start treatment with the lower dose (Losartan 50 mg + chlorthalidone 12.5 mg; Losartan 50 mg + hydrochlorothiazide 12.5 mg).~Blood pressure (BP) figures will be evaluated and, in those patients who do not reach the therapeutic goal, defined as a decrease in Systolic blood pressure (SBP) / Diastolic blood pressure (DBP) values of 20/10 mmHg with respect to their baseline values or BP <140 / 90 mmHg, the dose will be escalated to the next available concentration for both treatments (Losartan 100 mg + chlorthalidone 25 mg; Losartan 100 mg + hydrochlorothiazide 25 mg) at 30 days or during an unscheduled visit.~After two months of treatment, the BP figures obtained with the final dose and the proportion of subjects who achieved a decrease in SBP / DBP values of 20/10 mmHg or <140/90 mmHg with respect to both combinations will be compared, and the frequency of adverse events presented will be described.
Phase IIIb, randomized, double-blind, prospective, multicenter study to evaluate the efficacy and safety of the fixed-dose combination of losartan / chlorthalidone compared with losartan / hydrochlorothiazide in the treatment of patients with essential arterial hypertension.