Nitroglycerin has a tendency to increase in price, and the price of a bottle is about 30-40 dollars. This drug is a clinical emergency drug that can be used to prevent and treat the symptoms of angina pectoris, especially when the onset of uncomfortable symptoms is sublingual to help end the onset of pain. In addition, it is widely used in clinical practice, such as for the treatment of acute myocardial infarction and heart failure. It can also be used to treat hypertension, pulmonary hypertension, and to relieve respiratory distress syndrome. At present, this drug is more commonly used in the clinic, and the effect is also better, but some people may experience hypotension or dilated headache after using it, so when using the drug, you must not use too much at one time, otherwise it may trigger hypotension.