[Modifying action of drug preparations on the effect of promutagen compounds].

The Ames test has shown that the action of nitrosomorpholine and cyclophosphane promutagens on bacteria of Salmonella typhimurium TA 1950 increases while using S-9 liver fraction of rats treated with pharmaceuticals of amidopyrine, reserpine and pyrazidol and decreases while using those treated with phenazepam.