[Taera]

in my school they said its something because of a chemical disbalance in body - though i cannot remember which disbalance. What the pills do is they insert some other chemical - what it does is reverses the situation. Meaning that you would likely go very hyper after taking these pills.

As for how it can be developed in adulthood, actually it can be - with aging and normal mutation this sometimes happens. Very rarely though.

For all i know, taking pills all your life is the only modern way of dealing with ADD.