Table 1.

Predicted genotype–phenotype relationships for selected CYP2C19 variants

Phenotype	Rapid metabolizer	Normal metabolizer	Intermediate metabolizer	Poor metabolizer
Genotype	*17/*17 *1/*17	*1/*1 *2/*17 *3/*17 *4/*17 *6/*17	*1/*2 *1/*3 *1/*4 *1/*6	*2/*2 *2/*3 *2/*4 *2/*6 *3/*3 *3/*4 *3/*6 *4/*4 *4/*6 *6/*6