title: Comparative plasma concentrations of quinidine following administration of one intramuscular and three oral formulations to 13 human subjects.
abstract: A GLC method, based on flame-ionization detection, was developed for the assay of methotrimeprazine and its sulfoxide in plasma. For a 6-ml aliquot, the sensitivity was 2-3 ng/ml for the unchanged drug and 4-5 ng/ml for the sulfoxide. The coefficient of variation, calculated from duplicate analyses of plasma samples, was 8-15% for concentrations between 10 and 100 ng/ml. Patients treated with orally administered methotrimeprazine had higher plasma levels of the sulfoxide than of unmetabolized drug. The method also was applied to the analysis of promazine and chlorpromazine in patient plasma.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D001682:Biological Availability; D002214:Capsules; D005260:Female; D006207:Half-Life; D006801:Humans; D007273:Injections, Intramuscular; D007700:Kinetics; D008297:Male; D011802:Quinidine / Q000008:administration & dosage / Q000097:blood*; D012996:Solutions; D013607:Tablets
chemical_list: D002214:Capsules; D012996:Solutions; D013607:Tablets; D011802:Quinidine