Angina pectoris is a clinical syndrome caused by acute and temporary ischemia and hypoxia of the myocardium due to insufficient blood supply to the patient’s coronary arteries, which manifests itself as pain in the precordial region when the patient is exerted or emotionally excited. The drugs used to relieve angina, such as “nitroglycerin”, “quick-acting heart pills” or “heartburn”, are usually called “heart medication” by patients. The drugs used to relieve angina, such as “nitroglycerin”, “quick-acting heart pills” or “cardiac pain”, are often referred to by patients as “cardiac drugs”. However, if the patient does not use the “heart medicine” properly, it will be difficult to play its role of first aid. In order to facilitate patients to correctly grasp the use of “heart medicine”, experts have compiled a total of 24 words of song, namely: the drug should be “new”, to prevent “addiction”, chew first, then contain. The posture is very important, the matter is not more than three, the medicine does not leave the body. The drug should be “new” The drug should be “new” means that the patient should carry the “heart-saving drugs” to be replaced in time, not to expire. Generally, the expiration date of “heart-saving drugs” is one year. When these drugs are found to be soft, sticky, discolored or broken, they should be replaced immediately so that they do not become ineffective in first aid and affect the treatment. The easiest way to prevent “heart medicine” from failing is for the patient to check the “heart medicine” once every 2 to 3 months, if it is placed under the tongue and taken without the characteristic “spicy feeling, burning feeling, through the heart feeling “or” bitter and spicy taste “is an indication that the drug has failed, should be replaced in a timely manner. Prevent “addiction” Prevent “addiction” means that the patient should prevent addiction when taking “heart-saving drugs”. If a patient suddenly stops taking a “heart drug” (or changes to another drug) within 24 hours, the calf muscles become sore and twitchy, which means that the patient is addicted to the “heart drug”. If a patient wants to prevent addiction to a certain “heart drug”, he or she can use two emergency drugs alternately. For drugs that are already “addictive”, the patient can take a slow withdrawal method to wean off the drug. Chewing first and then containing “chewing first and then containing” means that the patient should chew the tablet first and then put it under the tongue when using the “heart medication”. In this way, the absorption of the drug by the sublingual mucosa can be accelerated, so that the “heart-saving drugs” can quickly reach the heart in high concentration. This method is faster and more effective than the common method of taking medication. Posture” means that the patient should be in a seated position when taking the “heart-saving drugs”. Because, if the patient stands to take “heart medicine”, his head position is higher, often because of the peripheral blood vessel expansion and lead to insufficient blood supply to the brain, causing fainting; if the patient lies down to take the medicine, due to the low position of the heart, a large amount of blood in the body will flow back to the heart, but increase the burden on the heart, so that the patient’s angina symptoms are not easy to relieve. The matter is not more than three “matter is not more than three” refers to the patient in the symptoms of angina, repeatedly take “heart medicine” should not exceed three times. In the case that the “heart-saving drugs” are effective, the patient’s pain symptoms can be relieved after a few minutes of taking the drugs. If the patient’s pain is not relieved after taking the “cardiac medication”, the patient should take it again after 5 to 10 minutes. If the patient’s pain is not relieved after taking the medicine 2 to 3 times, he should consider that he is not suffering from angina pectoris, but myocardial infarction or other diseases, and should go to the hospital immediately. Therefore, the motto of “no matter but three” should be the motto of those who often use “heart-saving drugs”. The motto “keep the medicine with you” means that the patient should carry the “heart-saving medicine” with him/her. During the day, the patient should place the “heart medicine” in a convenient pocket (preferably the inside jacket pocket); at night, when the patient sleeps, the “heart medicine” should be placed on the side of the pillow where it is easily accessible, so that it can be reached in case of emergency.