My statement was perhaps too broad. It is possible for ADHD people to get high off their medications, yes. But that is a signal the dosage is too large. Normal dosage and usage won't get a person "high" in the traditional sense, much in the same way injecting insulin into a healthy person is bad but a diabetic person requires it for standard function, however too high of a dose would still be bad for a diabetic person too.

Suicidal ideation as a side effect is bad. I'm sorry you had that experience.