Distribution of the J1 haplotype variant rs2267439 across CYP2D6 diplotypes and its impact on risperidone metabolism.
CYP2D6 is a highly polymorphic pharmacogene responsible for the metabolism of more than 20% of commonly prescribed drugs. Clinical implementation of CYP2D6 pharmacogenetics relies on star allele nomenclature and the Activity Score system, yet substantial interindividual variability in drug exposure remains unexplained....