title: The metabolism of phenobarbitone, phenytoin and antipyrine in Black patients.
abstract: The half-lives of phenytoin, phenobarbitone and antipyrine were studied in adult Black patients to attempt to ascertain the cause of low phenytoin concentrations previously found in Black epileptics. The following half-life values were observed: antipyrine 5,7 +/- 1,9 hours, phenytoin 15,9 +/- 7,9 hours, phenobarbitone 63,0 +/- 18,2 hours, and phenytoin after 1 month of phenobarbitone therapy 31,5 +/- 11,9 hours. No explanation was obtained for the low phenytoin levels previously observed.
mesh_terms: D000328:Adult; D000983:Antipyrine / Q000097:blood*; D044383:Black People; D004347:Drug Interactions; D006207:Half-Life; D006801:Humans; D010634:Phenobarbital / Q000097:blood*; D010672:Phenytoin / Q000097:blood*; D013019:South Africa
chemical_list: D010672:Phenytoin; D000983:Antipyrine; D010634:Phenobarbital