Levodopa efficacy is to improve the symptoms of Parkinson’s disease, etc., role is to treat Parkinson’s disease, need to follow the doctor’s instructions to use the drug. Commonly used dosage forms of levodopa include capsules, injections, tablets, and so on. This product enters the body and is converted to dopamine to work, which improves the symptoms of Parkinson’s disease. It improves the brain’s tolerance to ammonia, improves central function, and causes wakefulness. It can be used to treat Parkinson’s disease (primary tremor paralysis), symptomatic Parkinson’s syndrome, and also for hepatic coma due to acute liver failure. Adverse effects seen with this product include nausea, vomiting, abnormal involuntary body movements, cardiac arrhythmias, upright hypotension, depression, hypertension, dysuria, and hemolytic anemia. Use with caution in hypertension, arrhythmia, diabetes, bronchial asthma, emphysema, hepatic and renal dysfunction, and urinary retention. Elderly people with osteoporosis, who are effectively treated with this product, should slowly resume normal activities to reduce the risk of causing fractures. During the use of the drug need to pay attention to check the blood routine, liver and kidney function and electrocardiogram. The drug is contraindicated in severe mental disorders, heart failure, severe cardiac arrhythmia, peptic ulcer, history of convulsions, glaucoma, pregnant and lactating women. The drug should be used rationally under the guidance of a doctor.