Factors such as genes, age, gender, weight, health status, liver and kidney functions can all affect an individual's response to drugs. However, a large number of studies have shown that genetic polymorphisms, that is, differences in genes, play a decisive role. As far as drug metabolism is concerned, because different people's genes are different, each person's metabolism rate of drugs is different. For the same drug, fast metabolizers may fail to absorb the active ingredients of the drug in a timely manner, resulting in poor treatment effect; while slow metabolizers may have serious adverse drug effects due to drug accumulation in the body.