title: Frequency of S-mephenytoin hydroxylation deficiency in 373 Spanish subjects compared to other Caucasian populations.
abstract: We have investigated the prevalence of poor metabolisers (PM) of S-mephenytoin in 373 unrelated, healthy Spanish Caucasian subjects, based on the enantiomeric S/R mephenytoin ratio in urine collected 0-8 h and 24-32 h after intake of the racemic drug. Five of the subjects were PM (1.34%, 95% confidence interval 0.18-2.59%), a prevalence lower than in 6 other Caucasian populations, but only significantly lower than in studies in France and Switzerland (P < 0.01). We suggest that this difference might be due to the use of different phenotyping procedures.
authors.affiliation: Department of Pharmacology and Psychiatry, Medical School, University of Extremadura, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Reviriego
authors.forename: L
authors.initials: L
authors.lastname: Bertilsson
authors.forename: J A
authors.initials: JA
authors.lastname: Carrillo
authors.forename: A
authors.initials: A
authors.lastname: Llerena
authors.forename: M J
authors.initials: MJ
authors.lastname: Valdivielso
authors.forename: J
authors.initials: J
authors.lastname: Benítez
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D006900:Hydroxylation; D008297:Male; D008617:Mephenytoin / Q000378:metabolism*; D008875:Middle Aged; D010641:Phenotype; D013030:Spain; D013237:Stereoisomerism; D044465:White People
chemical_list: D008617:Mephenytoin