Which of the following medications is a vasodilator used commonly for angina?

Nitroglycerin is a well-known vasodilator that is commonly used for the treatment of angina pectoris, which is a type of chest pain caused by reduced blood flow to the heart. The primary action of nitroglycerin is to relax the smooth muscles in blood vessels, leading to their dilation. This expansion of the blood vessels reduces the heart's workload and decreases the oxygen demand of the heart muscle, thereby alleviating the symptoms of angina.

In clinical practice, nitroglycerin can be administered in various forms, including sublingual tablets, sprays, and patches, allowing for rapid relief of angina symptoms during episodes. This efficacy in managing angina makes it a first-line treatment in emergency and chronic care settings for patients experiencing this condition.

The other medications listed serve different therapeutic purposes. Ibuprofen is a non-steroidal anti-inflammatory drug (NSAID) used primarily for pain relief and inflammation, while aspirin is an antiplatelet medication that helps prevent blood clots and is often prescribed for cardiovascular protection but does not directly alleviate angina. Metoprolol is a beta-blocker, which can reduce the heart rate and myocardial contractility, ultimately lowering oxygen demand, but it does not have vas