Abstract
Investigations were made on the influence of several drugs on uropepsin (U. P.) as well as on the relationship between urodiastase and U. P.
1. Imidalin : Influence of Imidalin injection was investigated by the changes produced in the gastric acidity and U. P. content. U. P. showed an increase when the acidity at the time of hunger was above 20 even though the maximum acidity by the injection of Imidalin was above 31-61. While all the others, showed a decreasing tendency instead.
2. Adrenochrom, c preparation: U. P. content decreased by the administration of adrenochromic preparation temporarily but increased thereafter.
3. E, nzynolum: U. P, showed a moderate increase 2 days after administration of Enzynolum.
4. Urodiastase and U. P.: Both Urodiastase and U. P. showed a tendency to increase after operationn though there existed no parallelism between them.
