A very real disorder that often faces a lot of skepticism. This is largely due to the fact it is a very overprescribed and misdiagnosed illness, even more so then SSRI's for depression.
The most widely believed neurological cause of adhd is a problem with dopamine(catecholamine responsible for pleasure\reward system) over efficiency in the transport of dopamine leads to the reuptake before it's full effects are gained.
Dopamine is also vitally important when it comes to motivation and what we can derive pleasure from. eg. normal person can do activity A for hours adhd person being identical to the normal person but having the overactive reuptake loses interest and the ability to persevere with activity A much much faster.
This dopamine problem becomes especially problematic when it comes to the frontal lobes leading to problems with attention, memory and problem solving.
Stimulant based drugs such as ritalin(methylphenidate) adderall(l-amphetamine, d-amphetamine), dexedrine(d-amphetamine), desoxyn(d-methamphetamine) all work by inhibiting the dopamine reuptake and by releasing dopamine, this works by fixing a lot of the dopamine related problems theorised to be the cause of adhd.
This ridiculous overprescribing needs to be stopped though, testing needs to be improved because at the moment it just gets handed out like candy. Just because billy is lazy and doesn't like doing his homework does not mean he should be slapped on prescription speed for the next 10 years of his schooling.
Multi - billion - dollar - pharmaceutical - company : "BLAR BUY MY PILLS"
Generic soccermum : "I need an excuse for the incompetence of my son who really doesn't have adhd, little do I know this is just something else my child doesn't need, oh look an ad for depression you know i was feeling kind of sad the otherday when a family member died I think i need a 12 month prescription to paxil or zoloft"
Multi - billion - dollar - pharmaceutical - company : "NNNnnmmmm dollarmoney"
*multi - billion - dollar - pharmaceutical - company resembling an overweight t-rex eats truckloads of money*
Generic soccermum : "My son has adhd and i have severe depression I can't handle life"