[Pindolol as an antihypertensive agent].

26 hypertensive patients groupded according to the severity-index and the WHO-index were treated with pindolol (monotherapy, 15 mg daily). The response of blood pressure depression was statistically significant, although not always sufficient when judged by clinical parameters. Plasma renin activity responded variably to the treatment in different patients and different groups. In 18 patients a statistically significant increase of serum potassium could be observed. No major side effects of therapy were encountered.