Nitroglycerin can not slow down the heart rate, nitroglycerin is a nitrate drug, can expand the coronary blood vessels on the heart, improve myocardial blood supply, is the treatment of coronary atherosclerotic heart disease one of the drugs. In angina attack sublingual nitroglycerin can rapidly expand the coronary blood vessels to relieve the patient’s symptoms, is one of the patients with coronary artery disease portable emergency medication, nitroglycerin on the patient’s heart rate does not slow down the role of some patients in containing nitroglycerin after nitroglycerin because of nitroglycerin’s slight antihypertensive effect, on the contrary, there will be a faster heart rate reaction. In the application of nitroglycerin should pay attention to the patient’s blood pressure, if there is a drop in blood pressure, you should immediately stop using nitroglycerin and change to other drugs, such as fast-acting heart pills, musk cardioprotection pills and other sublingual emergency treatment.