Normal people taking nitroglycerin will not have special symptoms in the vast majority of cases, only in a small number of cases can appear in the rapid decline in blood pressure, and manifested as headache, dizziness, nausea, vomiting, weakness and other symptoms. Nitroglycerin belongs to the nitrate class of drugs, has the ability to dilate arterial and venous blood vessels, dilate coronary arteries, reduce myocardial oxygen consumption, can quickly improve the symptoms of myocardial ischemia. Oral nitroglycerin can effectively treat angina pectoris and acute myocardial infarction. Therefore, after taking nitroglycerin in normal people, a drop in blood pressure is a normal manifestation and does not need special treatment. If there are obvious symptoms of low blood pressure, you should go to the regular hospital, test the vital signs, and make the next step in time.