High plasma concentrations of beta-receptor blocking drugs and deficient debrisoquine hydroxylation.
D000319:Adrenergic beta-Antagonists / Q000097:blood*; D000328:Adult; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics; D003647:Debrisoquin / Q000378:metabolism*; D006801:Humans; D006900:Hydroxylation; D007546:Isoquinolines / Q000378:metabolism*; D008875:Middle Aged; D010641:Phenotype
D000319:Adrenergic beta-Antagonists; D007546:Isoquinolines; D003577:Cytochrome P-450 Enzyme System; D003647:Debrisoquin