Kinetics of methylprednisolone and its hemisuccinate ester

Clin Pharmacol Ther. 1985 May;37(5):502-7. doi: 10.1038/clpt.1985.79.

Abstract

Methylprednisolone in the form of its hemisuccinate ester was injected intravenously in doses of 10 mg/kg and 63.1 mg. Plasma levels of methylprednisolone and of the ester were measured and their kinetics were calculated. Results indicate dose dependency in the kinetics of both. About 10% of the dose was excreted unchanged as hemisuccinate in the urine, indicating incomplete conversion of the prodrug. When methylprednisolone (80 mg) was also taken by mouth, the relative bioavailability of the tablets was 99%. Saliva levels of methylprednisolone were low but paralleled plasma levels in the postdistribution phase. No methylprednisolone hemisuccinate was found in saliva.

Publication types

  • Comparative Study

MeSH terms

  • Absorption
  • Administration, Oral
  • Adult
  • Biological Availability
  • Chromatography, High Pressure Liquid
  • Female
  • Half-Life
  • Humans
  • Injections, Intravenous
  • Kinetics
  • Male
  • Methylprednisolone / analogs & derivatives*
  • Methylprednisolone / blood
  • Methylprednisolone / metabolism*
  • Methylprednisolone Hemisuccinate / blood
  • Methylprednisolone Hemisuccinate / metabolism*
  • Middle Aged
  • Saliva / analysis

Substances

  • Methylprednisolone Hemisuccinate
  • methylprednisolone 17-hemisuccinate
  • Methylprednisolone