Abstract Funding Acknowledgements Type of funding sources: None. Background Essential hypertension (H), which is combined with abdominal obesity (AO), is characterized by the early formation of refractoriness to antihypertensive therapy. In this regard, it is urgent to search for the most effective therapy regimens, among which fixed combinations (FC) of drugs have recently attracted considerable interest. Purpose To study the efficacy of FC olmesartan (O) and amlodipine (F) and adherence to it in patients with H and AO. Methods. 60 patients with grade 2 H with AO of I-II degrees (36 men and 24 women aged 48 to 62 years) were examined using standard clinical, biochemical and instrumental methods. Before enrollment in the study, all patients received various non-FC two-component combinations of antihypertensive drugs, however, target blood pressure (BP) levels were not achieved by any patient. After inclusion in the study, all patients were transferred to FC O and A, which was prescribed once a day , taking into account BP levels in the following daily doses: 20/5 mg; 40/5 mg and 40/10 mg. The examination was carried out for 3 months with dose adjustments every 7-10 days. Results. The use of FC O and A made it possible to achieve the target BP level after 3 month of therapy in 72% of patients with H and AO. At the same time, high adherence to this therapy was also noted: 80% of patients continued to receive this therapy for 3 months. It was found that in order to achieve target BP levels, in 84% of patients it was necessary to use O and A in a daily dose of 40/10 mg, in 16% of patients -in a dose of 40/5 mg. The tested FC was characterized by a low incidence of side effects, the most frequent of which was leg edema (in 7% of patients) and good tolerability (therapy withdrawal rate was 3%). Conclusion. The established high antihypertensive efficacy and tolerability of FC O and A in patients with H and AO indicates the promise of its widespread use in this category of patients.