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Myoclonus has been infrequently observed in patients receiving lithium therapy, and associated electroencephalographic (EEG) changes have not been well described. We report two women, ages 35 and 48, who, after the initiation of lithium carbonate therapy, had several generalized tonic-clonic seizures followed by myoclonic seizures. In both, myclonus was associated with repetitive sharp waves on the EEG. Although the epileptogenicity of lithium remains controversial, the occurrence of myoclonic seizures associated with lithium treatment suggests a proconvulsant effect of lithium in susceptible individuals.
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Received in revised form: January 26, 1987
Received: November 15, 1986
☆Presented in part at the annual meeting of the American EEG Society, Orlando, FL, October 1985.
© 1987 Published by Elsevier Inc.