本实验给家兔静脉注射酪氨酸(每天100mg/kg),连续20天。观察结果表明,大剂量酪氨酸对家兔血压和心电无影响;组织中儿茶酚胺含量和血清T_3、T_4水平与对照组无明显差异;形态学观察心脏、肝、肾、子宫和卵巢组织无任何异常表现。因此,初步认为长期大剂量外源性酪氨酸对家兔无毒性作用。 In this experiment, rabbits were intravenously injected with tyrosine (100 mg/kg daily) for 20 consecutive days. Observations showed that high-dose tyrosine had no effect on blood pressure and ECG in rabbits; there was no significant difference in catecholamine content and serum T_3, T_4 levels between the control group and the morphological observation of heart, liver, kidney, uterus, and ovarian tissue Any abnormal performance. Therefore, it is initially believed that long-term high doses of exogenous tyrosine have no toxic effects on rabbits.