Levocarnitine is a natural substance in the body, which is necessary in energy metabolism. Its main role is to promote the metabolism of lipids and play a role in improving myocardial ischemia and relieving angina pectoris. It is clinically indicated for patients with angina pectoris and can also be used for cardiomyopathy, arrhythmia, hyperlipidemia and myospasm in dialysis. Levocarnitine Oral Liquid is mainly used to supplement the deficiency of levocarnitine in the body, as chronic renal failure patients can suffer from levocarnitine deficiency due to hemodialysis. It is safe and has no significant adverse reactions. After oral administration, gastrointestinal symptoms such as heartburn, acid reflux and nausea may occur, as well as allergic reactions such as local skin redness, itching, rash, or even limited edema-like changes in the skin, which are prohibited if the allergic symptoms are severe.