Can slow reaction rate, increase temper and can make it harder to concentrate.
Either let them know you are there or check your blind spots
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.
Self-depiction is a very important factor of confidence, happiness, and attitude.
Remaining physically fit will make the person more "attractive" and likable by opposite genders.
Physical activity is necessary towards happiness, confidence, and just health.