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The use of anticonvulsants in the aftermath of mania

The Royal London Hospital, St Clement’s, London, UK, John.Cookson{at}ELCMHT.NHS.UK

Brent Elliott

Johnson Unit (PICU), The Ladywell Unit, Lewisham University Hospital, London, UK

This paper reviews the evidence for the efficacy of anticonvulsants in the continuation and maintenance phases of treatment of bipolar disorder, when there has been an episode of mania (Bipolar-I disorder). The evidence to be considered is primarily that arising from randomized controlled trials.

A literature search was performed to identify all randomized controlled trials of anticonvulsants used as maintenance treatment for bipolar-I disorder. Placebo-controlled studies were preferred, however there have been relatively few of these and clinical practice must therefore be guided by evidence carrying a lower level of conviction.

Valproate monotherapy lacks a convincing evidence base. The view that valproate is more effective than lithium in rapid cycling has not been borne out. Lamotrigine is effective in preventing depression after an episode of mania. As monotherapy, lithium appears superior to carbamazepine in bipolar patients not previously treated with either drug. The combination of lithium and carbamazepine may be superior to either drug alone, in certain treatment-resistant patients, but is associated with increased side effects. Other anticonvulsants lack evidence supporting their use in bipolar disorder except in treating co-morbid alcohol dependence, anxiety and bulimic symptoms.

Valproate continues to be recommended by most current guidelines despite the lack of evidence.

Key Words: mania • biopolar • maintenance • anticonvulsant • valporate • lamotrigine • carbamazepine

Journal of Psychopharmacology, Vol. 20, No. 2 suppl, 23-30 (2006)
DOI: 10.1177/1359786806063073


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