[On the pharmacology of piprozoline (author's transl)].

Ethyl (Z)-(3-ethyl-4-oxo-5-piperidino-thiazolidin-2-ylidene)- acetate (piprozoline, Gö 919, Problin) is a new potent choleretic which can be classified as a true cholepoietic agent. Accordingly the substance increases bile fluid and solid content as well. A dose-dependent choleretic effect could be shown in all species investigated. The choleretic effect of piprozoline is long-lasting and superior to that of the other choleretics compared with. There was a significant inhibition of experimentally induced liver damage in animals by piprozoline given prophylactically. Our experiments did not reveal any pharmacological properties interfering with the use of piprozoline as a choleretic.