Coenzyme Q10 is useful for shortness of breath due to cardiovascular disease, and other causes of shortness of breath should be treated promptly. Coenzyme Q10 mainly has the efficacy of protecting ischemic myocardium, anti-heart failure, liver protection, etc. It is suitable for the adjuvant treatment of hepatitis (e.g. viral hepatitis, subacute hepatic necrosis, chronic active hepatitis), cardiovascular diseases (e.g. chronic cardiac insufficiency, viral cardiomyopathies), as well as the comprehensive treatment of cancer in order to alleviate the adverse effects caused by radiotherapy. The drug has some therapeutic effects on chest tightness and shortness of breath caused by cardiovascular diseases, and the specific efficacy varies from person to person. In addition, chest tightness and shortness of breath may also be related to respiratory diseases (e.g. chronic obstructive pulmonary disease), neuropsychiatric causes, anemia, etc., and should be further treated in the hospital. Note that Coenzyme Q10 is contraindicated in people who are allergic to the product. Adverse drug reactions mainly include stomach upset, loss of appetite, nausea, diarrhea, palpitations, skin rashes and so on. Specific medication should be under the guidance of a specialist, not unauthorized use of medication.