* A case report suggests that lamotrigine may increase the plasma concentrations of risperidone. <ref> {{Pubmed|15800164|Bienentreu at al, Increase in risperidone plasma level with lamotrigine. Am J Psychiatry. 2005 Apr;162(4):811-2}}</ref>

* Pharmacologic response and serum risperidone levels should be monitored more closely whenever lamotrigine is added to or withdrawn from therapy. <ref name="drugscom">

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