The present study was designed to estimate the effectiveness of non-invasive auxiliary lung ventilation under continuous positive airway pressure (CPAP therapy) and phototherapy applied for the treatment of adolescents presenting with essential arterial hypertension and obstructive sleep apnea/hypopnea. It was shown that CPAP therapy decreased the level of arterial pressure (AP) either to normal or to high normal values in accordance with the patients' gender and age. It was confirmed that phototherapy produced beneficial effect on the system of circadian rhythms in the patients with essential hypertension. These findings give reason to recommend the combined application of the above methods for the treatment of adolescents with essential hypertension and obstructive sleep apnea/hypopnea. The proposed treatment makes it possible to decrease arterial pressure due to the correction of obstructive breathing disorders in sleep and to normalize the circadian rhythm system in the adolescents suffering from essential hypertension and obstructive sleep apnea/hypopnea. The clinical application of this method would permit to reduce morbidity, the incidence of disability, and mortality from complications developing in adulthood.