Which of the following drugs is/are effective in treatment of Parkinson’s disease A: L-dopa B: omocriptine C: trihexyphenidyl D: carbidopa alone

Which one of the following statements is correct? A: Chlorpromazine is indicated in treating the nausea of levodopa treatment. B: Vitamin B6 increases the effectiveness of levodopa. C: Administration of dopamine is an effective treatment of Parkinson’s disease. D: Levodopa-induced nausea is reduced by carbidopa. E: Nonspecific MAO-inhibitors, such as phenelzine, are a useful adjunct to levodopa therapy.

左旋多巴的特点是 ( ) A: 可引起轻度体位性低血压 B: 不良反应少见 C: 作用较慢 D: 只有在脑内才能作用转变为DA E: 与carbidopa（卡比多巴）合用可增强疗效减少不良反应