Sit, stay calm, and rest. Your symptoms will often go away soon after you stop activity.
If you are lying down, sit up in bed. Try deep breathing to help with the stress or anxiety.
If you do not have nitroglycerin and your symptoms are not gone after resting for 5 minutes, call 9-1-1 right away.
Your health care provider may have prescribed nitroglycerin tablets or spray for severe attacks. Sit or lie down when you use your tablets or spray.
When using your tablet, place the pill between your cheek and gum. You can also put it under your tongue. Allow it to dissolve. DO NOT swallow it.
When using your spray, do not shake the container. Hold the container close to your open mouth. Spray the medicine onto or under your tongue. DO NOT inhale or swallow the medicine.
Wait for 5 minutes after the first dose of nitroglycerin. If your symptoms are not better, are worse, or return after going away, call 9-1-1 right away. The operator who answers will give you further advice about what to do.
(Note: your provider may have given you different advice about taking nitroglycerin when you have chest pain or pressure. Some people will be told to try 3 nitroglycerin doses 5 minutes apart before calling 9-1-1.)
DO NOT smoke, eat, or drink for 5 to 10 minutes after taking nitroglycerin. If you do smoke, you should try to quit. Your provider can help.
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Michael A. Chen, MD, PhD, Associate Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.