Papers And Originals

Choreo-athetosis and Encephalopathy Induced by Phenytoin

Br Med J 1974; 2 doi: (Published 27 April 1974) Cite this as: Br Med J 1974;2:204
  1. D. L. McLellan,
  2. M. Swash


    Two patients with intractable epilepsy who had been treated with various combinations of anticonvulsant drugs developed phenytoin encephalopathy. In both patients choreo-athetoid involuntary movements were prominent. Blood phenytoin concentrations were above 30 μg/ml. When phenytoin was given in smaller doses and its level in the blood fell the involuntary movements and other clinical manifestations disappeared.