What is the function of Nitroglycerin in the treatment of cardiac chest pain?

Nitroglycerin is primarily used in the treatment of cardiac chest pain due to its ability to relieve chest pain, particularly in cases of angina or acute coronary syndromes. It acts as a vasodilator, meaning it relaxes and widens the blood vessels, which leads to decreased myocardial oxygen demand and improved blood flow to the heart. By reducing the workload on the heart and increasing oxygen supply, nitroglycerin helps alleviate the pain associated with cardiac conditions.

The other options do not accurately reflect the primary action of nitroglycerin. It does not address gastrointestinal symptoms like nausea, nor does it have a direct role in reducing anxiety or influencing blood glucose levels.