A combined literature study & correspondence follow-up provided information about the development & further course of long-lasting neurological sequelae after lithium intoxication in 40 patients. Possible precipitating circumstances are noted in all but 8 cases. The neurological sequelae developed following abatement of the acute intoxication & typically showed cerebellar affection with ataxia & scanning speech. Measures & guidelines to prevent intoxications are discussed.