It can manifest differently in anyone. My father, my sister, and myself were all diagnosed with ADHD around the same time. My father has taken medication regul

It can manifest differently in anyone. My father, my sister, and myself were all diagnosed with ADHD around the same time. My father has taken medication regularly for years without issue, and my sister used it "tactically" for the purposes of doing schoolwork and testing, and would be focused but really drowsy. I, on the opposite end of the spectrum, would get strong symptoms of depression, and a constant feeling of nausea and lack of appetite to the point of being suspected of anorexia/bulimia by my physician. I tried a wide variety of medications throughout grade school and high school, and eventually gave up because they all gave me negative side effects of some kind.