[Effect of antibiotics on D-serotonin-reactive structures]

Experiments on the isolated organs showed that ampicillin and levomycetin have pronounced D-antiserotoninergic effects; antagonism of antibodies and serotonin was found to be of competitive type. At an increase in levomycetin dosage D-antiserotoninergic effect was followed by the spasmolytic effect. Kefzol and benzylpenicillin failed to show any D-antiserotonin-ergic properties.