Changes in chondroitin sulfate concentration in rabbit blood plasma depending on the method of its administration.

Glycosaminoglycans were determined in the blood plasma of rabbits as a function of time after intravenous, intramuscular and intragastric administration of chondroitin sulfate preparation. After intravenous administration two phases of chondoitin sulfate elimination from the blood with T1/2 131-135 min and 8.5-9.5 min, respectively were observed. The level of the blood plasma glycosaminoglycans did not increase after intragastric introduction of the chondroitin sulfate preparation. Excretion of glycoaminoglycans in the urine was also determined.