Normal people do not use nitroglycerin part of the people have no reaction, a few patients may appear head swelling, headache, blood pressure drop and other symptoms. Nitroglycerin belongs to the vasodilator drugs, the expansion of coronary arteries is more obvious, mainly used for the treatment of acute attacks of angina pectoris, normal people after taking the drug, normal people due to the absence of coronary artery stenosis, can not have any reaction. A small number of people do not have a therapeutic response to nitroglycerin, but may experience adverse reactions to nitroglycerin. Some patients may experience swelling and headache after taking the drug, which may be related to the vasodilating effect of nitroglycerin. Some patients may experience a drop in blood pressure, dizziness, and increased heart rate after taking nitroglycerin. Nitroglycerin belongs to the prescription drugs, should be taken under the guidance of a physician regular, allergic to the drug ingredients, more sensitive to the adverse effects of the drug, low blood pressure patients are prohibited.