I do have panic attacks. They are unpredictable, but manageable. I do not take medication for it. It is getting worse as I get older, but don't want to take meds unless it comes to the point of interfering with my work.
I just stop what I'm doing when I recognize the first signs, and breath through it. My employer knows about them, and understands why I don't come to the 'big' meetings. It's embarrasing, but it's funny how many people don't even know I have them. Even though I have this overwhelming feeling that people are watching me when I have one. So, I must be controlling them pretty good.