Abstract
Lithium-induced delirium occurring in geriatric patients with serum lithium levels that are within the “therapeutic” range (less than 1.5 mEq/L) has been described in the literature. We present a case that illustrates three major issues regarding this syndrome: (1) differentiating lithium-induced delirium from a recurrence of a chronic psychiatric disorder; (2) the use of the electroencephalogram in supporting this diagnosis; and (3) factors that may increase a patient's vulnerability to delirium while on lithium. A brief review of the most relevant literature is then presented. We conclude that lithium-induced neurotoxicity should be suspected in any patient receiving lithium who develops delirium, regardless of the serum level, and that immediate discontinuation of the medication be considered. (J Geriatr Psychiatry Neurol 1992;5:53–55).
Get full access to this article
View all access options for this article.