Parkinson’s drug treatment has the following principles: 1. Early treatment Parkinson’s disease in the early stages, only nigrostriatal degeneration and nerve cell reduction, resulting in decreased dopamine synthesis. In the late stage, dopamine receptor atrophy can occur, so that it can not bind to dopamine and make the therapeutic effect decreased or ineffective. Therefore, the early use of drugs is effective. 2.The principle of appropriate dosage When taking levodopa-based preparations (methyldopa, Xanax, etc.), it is advocated to start with a small amount and gradually increase the dosage until the symptoms improve, that is, to reach and maintain the effective dose. 3.Individualization principle The treatment of drugs is not simply administered, but should be individualized for the different conditions of different patients. 4, long-term medication At present, drug treatment can only improve the symptoms, can not eradicate the disease, and it is difficult to stop the disease progression, therefore, long-term medication should be taken, and the dose should be adjusted according to the efficacy. It is best not to exceed the limit.