Aim, To assess effectiveness of diovan, a novel angiotensin-II antagonist, in combined hypotensive treatment of patients with severe arterial hypertension. Material and methods, 15 patients with severe arterial hypertension received diovan in a dose 80-160 mg/day for 8 weeks in combination with clofelin, beta-adrenoblockers, ACE inhibitors, diuretics prescribed before the start of diovan. Diovan effects were studied by 24-h monitoring of arterial pressure, tolerance, changes in blood counts, central hemodynamics. Results, Adjuvant hypotensive treatment with diovan lowered arterial pressure to satisfactory levels in 80% of patients. 13.3% did not respond to diovan. 6.7% of patients were withdrawn because of allergy. Only 2 patients of those who completed the diovan course developed side effects in first two weeks of the treatment - they had head ache. Conclusion. Diovan is effective in combination with clofelin, ACE inhibitors, diuretics, beta-adrenoblockers.