Summary
The pharmacokinetics of a heparin fragment of low molecular weight (LMWH) of 4000-5000
D and unfractioned standard heparin (UFH) have been studied after i. v. injections
of different doses and infusions in 8 humans.
The heparin activity was significantly higher and the effect on APTT lower after LMWH
fragment as compared to UFH in the same doses.
The half-life of heparin activity was about 1 hr for UFH and about 2 hr for LMWH.
LMWH was found to be eliminated according to first order kinetics and there were no
signs of dose dependency.
Keywords
Heparin - Low molecular weight heparin - Pharmacokinetics - Humans