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To assess the anti-inflammatory effect of millimeter therapy in the treatment of partially controlled asthma, the fatty acid composition of erythrocyte membranes and their oxygenase derivatives were studied. Eighty-five subjects aged 18 to 45 years old were examined, 60 of them were diagnosed with partially controlled asthma and 25 were a control group, which consisted of conditionally healthy subjects without bronchopulmonary pathology. Two study groups were formed. Patients of the 1st group (n=30) received only basic medical treatment: inhalation glucocorticosteroid and β2-agonists of short action on demand. Patients of the 2nd group (n=30) underwent complex treatment: basic medical treatment in combination with millimeter therapy according to the developed technique. Clinical symptoms (frequency of nocturnal and daily asthma attacks per week, severity of cough, need for short-acting bronchodilators during the day), results of the asthma symptom control questionnaire (ACQ-5 test), lung function, composition of fatty acid (FA) in erythrocyte membranes, level of eicosanoids were assessed. The dynamics of clinical-functional and laboratory indicators in patients was evaluated one month after the start of treatment. The study established a modification of FA erythrocyte membranes composition, characterized by an increase in the proportion of some representatives of saturated and monounsaturated FA, increased production of arachidonic acid and its cyclooxygenase and lipoxygenase metabolites (thromboxane B2, leukotriene B4) against the background of deficiency of eicosapentaenoic and docosapentaenoic acids. A significant decrease in the level of oxygenated derivatives of fatty acids in the blood plasma of patients was revealed against the background of positive dynamics of clinical course of the disease in the 2nd group receiving complex treatment, which indicates the normalization of metabolic transformations of oxygenated derivatives of fatty acids, and as a consequence the extinction of allergic inflammation under the influence of electromagnetic waves of the millimeter range of extremely high frequency.