Abstract
Schwartzmann's reaction and Arthus' phenomenon were produced in rabbits and at the same time they received either cortison, enforced Nle-minolhagen C or Restamin with an intention of inhibiting the development of those reactions. On examining their serum protein fractions, in all cases, the pictures of serum protein fractions were found to be restored to normal. This tendency was especially strong on γ-globulin. Accordingly, it is understood that all the drugs tested showed the inhibition of antibody production the level of γ-globulin being maintained at normal value.