Trimetazidine hydrochloride tablets are used as prophylactic treatment for angina attacks, adjunctive symptomatic treatment for vertigo and tinnitus, with side effects of nausea, vomiting, weakness, neurological symptoms, allergic reactions. Contraindications are hypersensitivity to this product. Precautions are not to be used as symptomatic treatment for angina attacks, nor for the initial treatment of unstable angina or myocardial infarction, should not be used before admission or in the first days after admission, can worsen the symptoms of Parkinson’s disease or induce Parkinson’s symptoms, tremor, motor inability, hypertonia, and should be examined, especially for elderly patients. Special population use is pregnant women to avoid the use, lactating women should suspend breastfeeding, children should not be used, belong to the heart energy metabolism treatment drugs, can improve the energy metabolic process of cardiac muscle cells, so that cardiac muscle cells get more energy substances, to achieve its physiological function of the treatment method.