Good to note the distinction, Open Eyes. ADD can look very narcissistic at times. I think ADD and NPD can be comorbid though. My DH also seems to fall on the ADD spectrum, and for the last ten years he's also been one of the most narcissistic people I've ever known. (I've known him for about 35 years, since we were kids) Not totally sure on this, but from my understanding, the same parts of the brain tend to be involved. In regard to my DH, I've wondered if those parts of his brain are damaged or degenerating, causing an increase in the behaviors. It's hard to say, so it goes back to good boundaries with them and taking care of yourself.

Another note about codependency though - understanding it and doing the work helps prevent you from repeating the pattern with someone else, like your kids or a future partner.