Overview Losartan and HCTZ and Amlodipine vs Atenolol and Amlodipine (0954A-309)(COMPLETED) Status: Completed Trial end date: 2004-06-30 Target enrollment: Participant gender: Summary A study to evaluate the effects of combination losartan versus combination atenolol in patients with ambulatory systolic hypertension. Phase: Phase 4 Details Lead Sponsor: Merck Sharp & Dohme Corp.Treatments: AmlodipineAtenololHydrochlorothiazideLosartan