What can I do to stop a panic attack?

Difficult. You must be quick, as there rapidly is an "off-the-cliff" point where self-help techniques can't overcome the tidal wave. Controlled / concentrated breathing techniques; positive phrase repitition; biofeedback; (temporary) situation avoidance (if possible), are a few options. A good therapist/psychologist can help give you "tools for your toolbox" to use when coming on. Good luck!

Related Questions

What can I do to stop having panic attacks I'm always stressed out?

Start w med eval. It may uncover underlying medical problems that need to be addressed. Cognitive Behavioral therapy can be effective. Psych meds may be indicated. Aim for daily exercise, 8 hrs sleep /night & good nutrition w 5 servings of veggies & 4 of fruit per day. Try tai chi, yoga, Qi Gong, progressive muscle relaxation, deep breathing exercises or meditation. Take care. Read more...
Behavioral modificat. Learn how to step back from anxious moments, learn how to breath and if it becomes dysfunctional to you see your PCP for counseling and/meds. Read more...