Pharmacokinetics and bioavailability of methylphenobarbital in man.
- Resource Type
- Academic Journal
- Authors
- Hooper WD; Kunze HE; Eadie MJ
- Source
- Publisher: Lippincott Williams & Wilkins Country of Publication: United States NLM ID: 7909660 Publication Model: Print Cited Medium: Print ISSN: 0163-4356 (Print) Linking ISSN: 01634356 NLM ISO Abbreviation: Ther Drug Monit Subsets: MEDLINE
- Subject
- Language
- English
- ISSN
- 0163-4356
The pharmacokinetics and bioavailability of mephobarbital have been studied in 2 volunteers. Plasma levels of mephobarbital and phenobarbital were measured by gas chromatography-mass spectroscopy with selected ion monitoring. Urinary output of phenobarbital and the p-hydroxy derivatives of both mephobarbital and phenobarbital was measured by high pressure liquid chromatography. The time course of these plasma and urinary levels was monitored following single 800-mg oral and 200-mg intravenous doses in the 2 patients. The major conclusions of the study were that mephobarbital is reasonably well absorbed following oral dosing and that some 35% or so of the dose (by either route) is converted to the recently identified metabolite, p-hydroxymephobarbital.