title: Systemic availability of orally administered meperidine.
abstract: A comparison of the areas under the plasma concentration-time curves after intravenous and oral administration of meperidine in 4 normal subjects indicated that 48% to 56% of the oral dose avoided "first-pass" metabolism and was systemically available. Similar estimates were obtained by applying the Loo-Riegelman method for calculating drug absorption viz, 47% to 60%. Oral availability predicted from a knowledge of drug clearance (blood) after intravenouration-time curves after oral administration exhibited irregularities and double peaks possibly indicative of the action of meperidine on the gut or a recycling process.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D001682:Biological Availability; D005260:Female; D006801:Humans; D007408:Intestinal Absorption; D007700:Kinetics; D008297:Male; D008614:Meperidine / Q000008:administration & dosage / Q000378:metabolism* / Q000494:pharmacology; D008875:Middle Aged
chemical_list: D008614:Meperidine