Mr. Zhang, 62 years old and divorced, was admitted to the hospital 3 months ago for direct PCI for anterior wall myocardial infarction, and the operation was very timely and successful. After being discharged from the hospital, Mr. Zhang regularly took the five medications he was discharged from the hospital with, and even quit smoking for one month on the advice of his attending physician. But soon, Mr. Zhang, who used to go to the mahjong room almost every day to play mahjong, returned to the mahjong room and started smoking again. To make matters worse: feeling all right, Mr. Zhang capriciously stopped taking all his medications! As a result, on the fifth day after stopping his medication, just under three months after his first myocardial infarction, Mr. Zhang was admitted to the hospital with another myocardial infarction. Although Mr. Zhang was fortunate to have another brush with death after active resuscitation and thrombus aspiration by the doctor, the myocardial infarction again had some impact on Mr. Zhang’s ventricular function. In clinical practice, it will be found that patients with myocardial infarction will discontinue their medication at will during the treatment process after discharge from the hospital, some stop taking the medication because they feel good about themselves like Mr. Zhang; some stop taking the medication because they heard that there are so many side effects; some stop taking the medication because they are worried that dual antiplatelet therapy will cause bleeding ……. Clinically, there are many cases where private, or capricious discontinuation of medication has caused painful lessons, and some even pay the price of life for this. Therefore, all post-myocardial infarction patients should follow the professional advice of their specialist in medication use. If you have doubts or concerns about your current treatment, prescription or medication, you should seek professional help to make the right decision for you; never stop medication indiscriminately.