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Abstract
A method based on HPLC was devised for the estimation of RU 486 in blood and utilised
to study the pharmacokinetics of a single dose of 50 mg RU 486 administered orally
to 12 women on day 7 of the cycle. The dose was rapidly absorbed with peak plasma
concentration between 1 and 2 hours. Distribution was also rapid (mean t
α: 1.4h), whereas elimination was slow (mean t
β: 28.3 h). RU 486 was still detectable in some women at 72 h after administration.
The plasma concentrations fitted the equation for a two-compartment open model from
which the pharmacokinetic parameters were calculated. The mean total plasma clearance
was 3.0 1/h, and the comparison of our data with those published studies suggests
that the pharmacokinetics of RU 486 in Chinese women are similar to those of other
populations.


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Article info
Publication history
Accepted:
June 28,
1989
Received:
May 25,
1989
Identification
Copyright
© 1989 Published by Elsevier Inc.