Abstract:
:The pharmacokinetics of methylprednisolone sodium succinate (MPHS) and methylprednisolone (MP) were determined in six patients undergoing open heart surgery with cardiopulmonary bypass. Plasma concentrations of both compounds were measured by high-performance liquid chromatography after doses of MPHS of 1.7-2.4 g. The prodrug ester MPHS yields MP with an average formation rate constant of 0.70 +/- 0.29 hr-1. Peak concentrations of MP occur around 1-2 hours after loading and additional administration of MPHS. The pharmacokinetic values of the two drugs in patients having cardiopulmonary bypass were compared to those in younger, healthy subjects. The volume of distribution of MPHS was lower in the patients, and that of MP was similar to the value in controls. Total clearances of both agents were reduced by about 5 and 2 times. The elimination half-life of MPHS was increased slightly, whereas that of MP increased more than twice in the patients. Significant alterations in clearances occurred in patients, but concentrations of MP were appreciable and prolonged MP due to the extensive formation of MP from MPHS and reduced clearance of MP.
journal_name
Pharmacotherapyjournal_title
Pharmacotherapyauthors
Kong AN,Jungbluth GL,Pasko MT,Beam TR,Jusko WJsubject
Has Abstractpub_date
1990-01-01 00:00:00pages
29-34issue
1eissn
0277-0008issn
1875-9114journal_volume
10pub_type
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