He is most likely studying for pharmacotherapy since it is the study of medical treatment by means of drugs.
Pharmacokinetics studies hows the drugs move throughout the body. Both pharmacogenetics and pharacogenomics include the study of a person's genes.
Space that's my best guess
Answer:
Try to bring it up with another adult you can trust. Or if you can drive, you can go to the doctor and get it diagnosed for yourself.
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