Cardiac myosin (i.e. refers to injection with cardiac myosin) has the effect of promoting the repair of damaged myocardium, and the side effects include nausea, vomiting, skin rash, and localized soreness and pain sensation. The main component of injectable cardiac myosin is a small molecule polypeptide active substance, which can promote the repair of damaged myocardium under a variety of injury factors, and is suitable for use as an adjunctive drug for myocardial protection in the perioperative period of cardiac surgery, and contraindications to the use of the drug include those who are allergic to the product. Occasionally, nausea, vomiting, skin rash adverse reactions may occur after the use of the drug, most of the symptoms disappear after stopping the drug, may also occasionally appear localized soreness and pain and other local irritation symptoms, generally slow down the drip rate after the symptoms can disappear, can not disappear or allergic reactions should be discontinued. This product is usually used in hospitals by health care professionals.