Introduction. Combined antihypertensive therapy is indicated in 94% of patients with hypertension. Fixed combinations are preferable to use as they have a high profile of effectiveness, safety, more convenient to use and significantly increase the adherence. Objective. To evaluate the effectiveness of triple fixed combination of amlodipine/indapamide/perindopril for the control of blood pressure in patients who did not achieve the target blood pressure level in the previous combined therapy. Materials and methods. The study included 44 patients with hypertension of high and very high risk of cardiovascular complications (mean age - 58.59±10.57 years, 17 men, 27 women). Blood pressure levels, quality of life, anxiety and depression levels, adherence, biochemical indices, levels of inflammation markers (CRP, IL-6, IL-10) and endothelial dysfunction (sVCAM-1, VEGF) were assessed in all patients at baseline and after 6 months of amlodipine/indapamide/perindopril therapy. Results. Against the backdrop of the treatment, all patients reached the target level of blood pressure (BP), pulse BP decreased by 30.3 mm Hg. (p