Angina attack can contain nitroglycerin to relieve symptoms, containing nitroglycerin has the following care precautions: 1, containing nitroglycerin can only contain 1 tablet each time, to be contained under the tongue, generally nitroglycerin will take effect in 1-2 minutes. If the angina is not relieved after 5 minutes of observation, you can take 1 tablet again. This can be repeated for 3 times, each time with an interval of 5 minutes; 2. Nitroglycerin may cause postural hypotension when applied, especially when it is used for the first time, so when taking nitroglycerin, the patient must be in the sitting position or lying down, and must not take nitroglycerin standing up; 3. After taking nitroglycerin, some patients may have a headache, flushing, rapid heart rate, etc., which should not be too stressful, because nitroglycerin may cause angina pectoris. Don’t be too nervous, because nitroglycerin lasts only about half an hour, and these symptoms will disappear after the effect of the drug disappears. 4. In addition to taking nitroglycerin during an angina attack, if there are conditions, oxygen should also be given, and patients who are moving around should stop their activities and take a rest immediately.