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木虫 (知名作家)

[求助] 左旋多巴的长期反应

多巴胺是抑制性递质。长期服用大量左旋多巴后(左旋多巴口服后被L-芳香族氨基酸脱羧酶脱羧成为多巴胺),多巴胺受体会过度兴奋,出现手足、躯体和舌的不自主运动即运动过多症。不应该是多巴胺作用于多巴胺受体产生抑制作用吗?为什么多巴胺受体会兴奋?求解。
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