[Pipoxizin, a new bronchodilator].

: Pipoxizin is a new bronchodilator with the chemical name chlorhydrate-4-diphenyl-methylene-1-(2-/2-(2-hydroxy-ethoxy)-ethoxy/-ethyl/-ethyl)-piperidine. This substance exhibits powerful antihistaminic and antiserotonin properties but no parasympathetic or beta-adrenergic properties. The effects of Pipoxizin have been compared with those of the wellknown product hexoprenalin (Ipradol). Twelve male patients, each with bronchial obstruction, took part in the trials. Plethysmography before and after Alupent inhalation was carried out to determine the reversibility or irreversibility of the bronchial obstruction. On the following day, the plethysmorgraphic tests were repeated before and after intravenous injection of Pipoxizin, and on the third day, the tests were repeated again after intravenous injection of hexoprenalin. Pulse and blood pressure were monitored. Following the use of Pipoxizin, there was a significant decrease in the following parameters: RT, RE, RV, ITGV, pulse rate, and systolic blood pressure. A significant increase was found in FEV1. After hexoprenalin injection, there was a significant decrease only in RV and an increase in FEV1. A comparison of Pipoxizin and hexoprenalin shows a significant difference between the two products, Pipoxizin having the more favourable effect.