Its not impulsive , its making up for the "Deficit" , I will explian.
The standard party line that is repeated over and over by marketing ghost writers perpetuating the myth is:
"ADHD students often interrupt class and others due to an inability to control their impulses".
Lets say we are all having a polite conversation and me an ADD person is part of it. People are talking abcdefg... and I have something I want ...