I heard that the prescription drug Adderall (commonly used to treat ADD/ADHD) used to be prescribed as a weight loss medication. I believe this was done in the early 1990s but they no longer prescribe it for that use. Does anyone have a report or story online from a reliable source explaining what I'm talking about? I'm just wondering why it is not used as a weight loss prescription (if it ever, really was). Thanks!

Adderall is just amphetamines and dextroamphetamines. Amphetamines were used in the early 1900's for a lot of things (weight-loss among them). After all, you didn't need a prescription up until the 70's to posses or use amphetamines, and housewives along with business men would buy tabs or inhalers to get extra work done, to eat less if they didnt like their weight, and even just as a pick-me-up to deal with the stresses of business or the stresses around the house with the children. The actual pill, "Adderall" I do not believe has ever really been prescribed as a weight loss medication. Adderall itself was pretty much strictly ADD/ADHD or narcolepsy medication, and sometimes used by therapists as an antidepressant if no other meds helped.
My guess is that doctors shy away from prescribing it for weight loss because people who are over-weight generally have heart problems too, or at least it runs in their family. With amphetamines, or any stimulant really, it is really easy to screw up (or rather, increase) your blood pressure and heart rate. I'm swimmer and runner who is prescribed Adderall, and my resting heart rate while asleep (without the meds of course) has been recorded in the hospital as low as 20-32 beats per minute, while awake, just sitting there, in the 60s or lower, but if I took my meds that day, I could be laying awake in bed with a heart rate of near 110+.
Also, there are non-addictive weight-loss medications out there, so doctors will prescribe those more often, seeing as how amphetamines have a high risk/rate of dependency. Plus, there's always the part about how Adderall is becoming a bigger and bigger study drug on college campuses and its becoming more popular with the tweakers and speeders, and its illicit use as a weight-loss medication is also picking up speed. So doctors don't want to contribute to the underground distribution of the medication either.
I think I remember reading about a celebrity (Nicole Richie? among others) using it for weight-loss, and she ended up looking like Skeletor or something akin to him because she became addicted to it from using too high of a dose (she probably didn't even regiment her doses), and became anorexic from its misuse. Which is also, probably yet another reason why doctors don't prescribe it, one of the possible side effects (from its proper use, let alone improper use) is anorexia.
I hope you could understand what I was trying to get to, and I hope this helped answer your question.

I don't believe that Adderall was even prescribed as a weight loss medication even though that is a side effect. It is an amphetamine however and amphetamines were once prescribed as weight loss medications.

NO

Not exactly, but amphetamines were prescribed in the distant past for that purpose (instead of 1990's, think 1930's), and the less-than-scrupulous periodically try for a revival.

It was presribed in the ཐs as Obetrol to curve hunger, thus causing weight loss. That is what it was originally prescribed for.