There are many types of angina, including stable angina, unstable angina and variant angina. The most effective drugs for treating variant angina are nitrates, such as isosorbide mononitrate dispersible tablets, isosorbide mononitrate injection and nitroglycerin, which can dilate the coronary arteries and ensure sufficient blood flow to the heart muscle to maintain the contraction and diastolic function of the heart. If you have symptoms of variant angina, you need to go to the hospital for electrocardiogram, cardiac ultrasound, coronary CTA, coronary angiography, through which the degree of coronary stenosis can be clarified in anticipation of the next treatment plan, such as conservative drug treatment and coronary stenting surgery.