Frequency of S-mephenytoin hydroxylation deficiency in 373 Spanish subjects compared to other Caucasian populations. 1993

J Reviriego, and L Bertilsson, and J A Carrillo, and A Llerena, and M J Valdivielso, and J Benítez
Department of Pharmacology and Psychiatry, Medical School, University of Extremadura, Spain.

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.

UI MeSH Term Description Entries
D008297 Male Males
D008617 Mephenytoin An anticonvulsant effective in tonic-clonic epilepsy (EPILEPSY, TONIC-CLONIC). It may cause blood dyscrasias. Methoin,Methyl Phenetoin,5-Ethyl-3-Methyl-5-Phenylhydantoin,Mefenetoin,Mesantoin,Phenantoin,5 Ethyl 3 Methyl 5 Phenylhydantoin,Phenetoin, Methyl
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D010641 Phenotype The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment. Phenotypes
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006900 Hydroxylation Placing of a hydroxyl group on a compound in a position where one did not exist before. (Stedman, 26th ed) Hydroxylations
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly

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