The toxicity was manifested as tremors, visual difficulties, muscle weakness, gait ataxia, incoordination, headache, and increased cerebrospinal fluid pressure (US ATSDR (1995)).
中毒征兆表现为颤抖、视力困难、肌肉乏力、步态失调、动作失调、头痛及脑脊髓液压力升高（美国毒物和疾病登记署报告，1995年）。