Pretty sure my friend has ADHD. Should I say something to her?

[Tuftykitten]

I'm not a doctor. Not a specialist in this area.

Have been reading up on ADHD for a few years now. Pretty sure my friend has ADHD.
She said the other day that she wonders if she has it. That's the second time she's mentioned it recently. A child who knows her who has ADHD asked her if she had it too - just the other day.
She's exhibiting a lot of the symptoms of ADHD and its starting to have a negative effect on our friendship.

Yes, I think I don't want to be friends with her any more. I'm tired of her moods, the non-stop talking, the panicking over tiny, insignificant things, her snappiness and the way she speaks to me.
She's away for a number of weeks, so that gives me some time.
I'm going tell her that it's better that we don't spend time together any more, that we're not suited as friends.

I am trained to diagnose ADHD but I wouldn’t casually suggest that I think a friend has it. ADHD symptoms cross over with many other things e.g. anxiety, over active thyroid, chronic stress, trauma and so needs a careful multi-perspective assessment and history taking.

I would suggest she seeks an assessment if she mentions it again and leave it there.