Final answer:
Pharmacogenetic research has found that genetic variations in some African Americans can affect their responses to therapeutic drugs. Pharmacogenomics is the field that studies these genetic variations and how they influence individual drug responses.
Step-by-step explanation:
Pharmacogenetic research has found that some African Americans have genetic variations that affect their responses to therapeutic drugs. This field, known as pharmacogenomics, studies how genetic variations influence individual responses to drugs. The results of pharmacogenetic tests can help doctors choose the most effective drug and dose for a patient based on their genetic profile. For example, if a patient's enzymes break down a particular drug too slowly, standard doses may not be effective, while if a patient's enzymes deactivate a drug too slowly, it may cause side effects.