AmishRake,
you are right, sort of. Things like ADD and restless legs syndrome do exist, but by putting advertisements on TV, this gives people the idea that they are much more common than they really are. So, people who really don't have a classical diagnosis of a disorder come to the doctor seeking drugs because they fit the symptoms listed on the TV. This is bad medicine, but it sure increases drug company profits.
My favorite invented disorder is PMDD (premenstrual dysphoric disorder). What woman doesn't feel cranky before her period? But in actuality, a minute percentage actually need to be medicated, and they already have other underlying medical and mental issues.
I have restless legs syndrome- nearly 7 nights a week, and none of the new advertised medications worked at all for me. To classify it as a psychological disorder is absolute insane--it's a movement disorder. I guess it's just a way to increase revenue and find new uses for other drugs. For example, for restless legs syndrome, they treat you with drugs used for patients with Parkinson's disease. For a small few, they work. For the rest of us, it's back to the old way of treating restless legs - codeine and a valium-like drug(I'm not a pilot- no worries) . But because these are both generic, there's not much profit to be made, so they come up with Requip and Mirapex and advertise the HELL out of them, and the masses flock to the doctor asking for them.
Just wanted to clarify your info- you were generally on the right track, though!