What is the first action a nurse should take when a patient with chest pain reports his symptoms?

When a patient reports symptoms of chest pain, the first action should be to administer a tablet under the tongue, which is typically nitroglycerin. This medication is crucial in the management of angina and potential myocardial infarction as it works rapidly to dilate blood vessels, improving blood flow to the heart and alleviating pain.

Administering nitroglycerin under the tongue is important because it allows for quick absorption into the bloodstream, providing almost immediate relief. This is often the prescribed first line of action in acute angina management, particularly when the patient’s symptoms are suggestive of cardiac events.

While monitoring vital signs, calling a doctor, or beginning CPR may become necessary depending on the patient's condition and the severity of their symptoms, the immediate administration of nitroglycerin directly addresses the chest pain and possible underlying issues. Immediate treatment is crucial in cardiac-related situations to prevent further complications or damage to the heart muscle.