Pharmacological clinical studies about beta-blocking agents provide profound insights into the effects of these kinds of drugs in adults. Very little research on children has been done up to now. The hydroalcoholic solution of a beta-blocking agent (Visken Sandoz) facilitated this research on children. This paper investigates the effects of a beta-blocking agent in 19 healthy children aged between 5 and 13 years: arterial blood pressure, heart rate, systolic and diastolic parameters were controlled. The children were examined before and after a 10 day therapeutical cycle in which Pindolol 250 gamma/kg/die was administered. Statistically significant variations were obtained for TD, TT, TT/TET, QTc, but no variation for heart rate, TET, SM, QA2, diastolic parameters and arterial blood pressure. It is supposed that negative chronotropic effect and hypotensive activity were found only in patients with an altered cardiac rate and with an altered arterial blood pressure respectively. The kinetics of the drug is also described and its easy pediatric utilization is underlined.