Aims of study: efficacy and tolerance of a betablocker (acebutolol) on moderate severe hypertensive patients Method: open study on in patient (2 months) and out patient (1 month) Results: There were 25 patients (9 males and 16 females), aged from 31 - 65 (mean 54, 68), with diastolic BP between 90 - 120 enrolled in the study.