if you are in the middle of a panic attack there are things you can do to end it... and mostly, that means you need to stop trying to end it

understand that it is a temporary condition, which will go away... understand that it is a medical condition, and its not your fault... understand that it is a symptom, which is temporary... and understand that a dr, therapist, friend, or even a pet, can help you to make the changes that are needed to keep them from starting in the first place

understand that you are not alone

If the problem is something I can't or shouldn't change, I'll force myself to be distracted.--Even if that means I refuse myself the right to think. If you're alone, singing helps. It distracts thoughts and molds emotions. "Grounding" or "mindfulness" helps, too (I think they're the same thing.--Which means to focus on something so small, like breathing, so intensely, that thinking of something else later becomes easier.--It's also supposed to help with hallucinations.

Also, you can stop talking about certain subjects so the person won't go totally mentally insane. Sometimes that helps.