CYP2C9 CPIC guidelines
CPIC guideine for NSAIDs based on CYP2C9 genotype
CPIC guideline for phenytoin based on CYP2C9 and HLA-B genotype
CPIC guideline for warfarin based on CYP2C9, VKORC1 and CYP4F2 genotype
For gene-specific information tables (i.e. CYP2C9 allele definition, allele functionality, diplotype-phenotype and frequency tables) see guideline pages or PharmGKB.