The looks of the disorder are different across age and gender.

The frontal lobe of the brain, which controls these behaviors, matures until age 21. As children mature, some symptoms get better -- though they don't grow out of ADHD, as used to be believed, and half need treatment into adulthood.

Some work beautifully for some children but not for others. We don't know what works for what child ahead of time. There are lots of things to try, including non-medication treatment.

Anxiety disorders, depression can cause the same appearance of the same symptoms (as ADHD), but you have a whole different reason for these, so treatment is dramatically different.

Medication will help reduce some symptoms, but taking medication over time won't eliminate them. We can't say if you take this drug for five years, (the problem) will go away. We can't predict what will happen.

I don't think you can make a child have ADHD. A child is born with a predisposition, and the environment will make or break that predisposition.