Sit or lie down and rest
Slow your breathing
Inhale through your nose for 4 counts
Exhale slowly for 6 to 8 counts
Loosen tight clothing
Drink water if you may be dehydrated
Move to a cool, quiet place
Avoid caffeine, nicotine, alcohol, and stimulants
Stop exercise and cool down gradually
Try gentle vagal maneuvers if you have been told they are safe for you
Use relaxation techniques such as meditation or progressive muscle relaxation
Check your pulse again after a few minutes
Seek urgent medical help if you have chest pain, shortness of breath, fainting, severe dizziness, or a very fast heart rate that does not come down