Result: In 50 healthy people, 7 subjects (14.00%) were identified as poor metabolizers(PMs),consisting of 5 homozygous for CYP2C19*2/CYP2C19*2 and 2 heterozygous for CYP2C19*2/ CYP2C19*3,there was no homozygous for CYP2C19*3/CYP2C19*3 being found.