A panic attack is a feeling of sudden and intense anxiety. Panic attacks can also have physical symptoms, including:- shaking- feeling disorientated- nausea- rapid, irregular heartbeats- dry mouth- breathlessness- sweating- dizzinessThe symptoms of a panic attack are not dangerous, but can be very frightening. They can make you feel as though you're having a heart attack, or that you're going to collapse or even die.Most panic attacks last somewhere from 5 minutes to half an hour. Thank you Dr.