Active treatment of isolated systolic hypertension in elderly patients using indapamide with or without perindopril resulted in significant reductions in mortality, stroke, and heart failure compared to placebo. Systolic blood pressure was reduced by 15 mmHg in the active treatment group. The benefits of treatment were seen early with number needed to treat of 94 for stroke and 40 for mortality reduction over 2 years. Treatment was also found to be safe with no significant differences in adverse lab values between groups.