Medication and DOT

I see a lot of posts here about vicodin, Oxycodone, etc. - But what about anti-anxiety meds? I've been on Klonopin for quite a few years now, due to social anxiety disorder. I talked to a school recruiter today, not a company recruiter, and he made the statement 'That drug is on the DOT list as unacceptable." - Oookay, so, how is it 'on the list', if there is NO list? I think I got an idiot.. Or at the very least someone who's making guesses.

The last time I spoke with a trucking company on this subject, I was told that if your Dr. knows you're on it, as well as how long you've been on it, and says it does not in any way effect your driving ability (When taken properly, of course), then the company will respect this, and it becomes a non issue.. Unless you do something stupid like eat half the bottle. (Yes, respect and company typically don't belong in the same sentence, but it was the only way I could think to word it.

Does it depend on State? Company? Is there any site I can reference to get a good idea of what's what (I saw someone post numbers from what I assume is a list, but in not having the link, those numbers aren't terribly useful to me), aside from speaking directly to a company recruiter (Which I will if I have to, but would like to have some info beforehand at least), that will let me know what is, and is not acceptable medication for lifelong conditions?

The school recruiter stated that I could speak with my Dr., and get transferred to another medication, but he obviously doesn't quite understand just how difficult that can be, especially after that many years. It took many, many tries with various medications to find one that worked properly in the first place, and I have to say I don't like the idea of being told I can't drive a truck because I'm taking care of a medical condition, especially when the medication being used doesn't effect my driving.

Any input, links, or suggestions on this matter would be greatly appreciated.