Delirium syndrome as a side-effect of lithium in normal lithium levels
Niethammer, R.; Keller, A.; Weisbrod, M.
Psychiatrische Praxis 27(6): 296-297
2000
ISSN/ISBN: 0303-4259 PMID: 11050737 Document Number: 513520
Lithium is used with great success in the treatment of manic patients and for prophylaxis of bipolar disorders. There are only few reports about neuropsychiatric side effects at therapeutic serum levels. We report on a 38 year old woman with bipolar disorder who was treated with lithium for 20 years without side-effects. Subsequent to a manic episode, she became disoriented at night and showed marked memory deficits. The patient did not show any neurological or gastrointestinal signs of intoxication. Lithium serum-levels were in therapeutic range. The psychiatric symptoms disappeared when lithium was stopped. We interpret these symptoms as delirant syndrome with pseudo-dementia at therapeutic lithium serum levels. This side-effect must be taken into account even in patients on successful longtime lithium therapy.