Isosorbide mononitrate is a long-acting nitrate medication prescribed to prevent angina (chest pain) in patients with coronary artery disease. Unlike fast-acting nitrates used for acute attacks, it is taken regularly to keep blood vessels dilated and reduce the frequency of angina episodes.

Nitroglycerin is a fast-acting nitrate medication used primarily to treat and prevent angina (chest pain) caused by coronary artery disease. It works rapidly by relaxing and widening blood vessels, allowing more blood and oxygen to reach the heart muscle.

Metoprolol is a beta-blocker used to treat high blood pressure, chest pain (angina), and heart failure.

Diltiazem is a non-dihydropyridine calcium channel blocker used to treat hypertension, angina, and certain heart rhythm disorders (arrhythmias) by slowing the heart rate.