Overview MK0954A-264 Filter Study (0954A-264)(COMPLETED) Status: Completed Trial end date: 2005-06-02 Target enrollment: Participant gender: Summary To compare the blood pressure lowering efficacy, safety and tolerability of a combination drug to a single drug taken once daily in patients with uncontrolled blood pressure following a 4-week filter on the single therapy product. Phase: Phase 3 Details Lead Sponsor: Merck Sharp & Dohme Corp.Treatments: HydrochlorothiazideLosartan