Despite the existing recommendations for the diagnosis and treatment of arterial hypertension, a wide selection of antihypertensive drugs, the efficacy of treatment of arterial hypertension remains low. The main cause for unsatisfactory control of arterial hypertension is patients’ non-adherence to treatment, which adversely affects the prognosis for cardiovascular complications. The first step in increasing adherence to antihypertensive therapy is to determine its level. There are various methods characterized by their accessibility and accuracy for assessing adherence. There are several categories of factors influencing the level of adherence. Identifying the cause in a subsequent patient is a significant step in reducing adherence to antihypertensive therapy. In addition, it’s necessary to use strategies to increase adherence to antihypertensive therapy, including both “simplification” of the treatment regimen and strengthening the doctor-patient interaction. The aim of this consensus is to summarize and supplement knowledge about the prevalence of adherence to antihypertensive therapy in patients with arterial hypertension, methods for assessing the level of adherence, the reasons for low adherence to the treatment of arterial hypertension and approaches to improving adherence to antihypertensive medications.