The dynamics of selenium concentration changes in blood, organs and ti
ssues of rats after a single intragastric administration of selenium y
east and sodium selenite was determined. The course of selenium concen
tration changes in blood was described, the pharmacokinetic parameters
were estimated according to the trivalent equation of dicompartment m
odel and the selenium content in liver, kidneys, small intestine, sple
en, heart, brain, stomach, testicles and prostate was determined 48 h
after the administration of selenium preparations.