Which medication is used to treat angina pectoris?

The medication commonly used to treat angina pectoris is nitroglycerin. This drug works by dilating blood vessels, which reduces the heart's workload and increases blood flow to the heart muscle. This helps relieve the painful symptoms of angina by alleviating the heart's oxygen demand during episodes of chest pain.

Verapamil is a calcium channel blocker that can also be used for angina, but it is primarily prescribed to manage hypertension and certain types of arrhythmias. While isosorbide mononitrate is indeed another effective treatment for angina, its long-acting nature makes it suitable for preventing angina attacks rather than treating acute episodes.

Aspirin, while useful in managing cardiovascular risks and preventing clots, does not directly treat angina pectoris symptoms. It works by inhibiting platelet aggregation, thus decreasing the risk of heart attacks rather than addressing the pain associated with angina.

In summary, while isosorbide mononitrate is beneficial for angina, nitroglycerin is the most recognized and immediate treatment for relieving acute angina symptoms.