I too dealt with this at my last job. I was nicknamed “Squirrel” because of similar actions. Any car or motorcycle that drove by I would be looking out the window. Weird noises or things of the like always caught my attention more than answering dozens of emails. For the most part, I didn’t mind the nickname, even though the main perpetrator has an ADHD son, which is ironic.
I guess my first question would be what steps are you taking to minimize the symptoms? I personally don’t like using medication, but it hasn’t been necessary for me, so I try all the natural methods for controlling symptoms. I try to get more sleep, avoid sugary foods, get some exercise, finding helpful music, etc.
I think Penny is on to something though. I think both a talk with HR and individual talks as events arise might help.
I hope this helps!