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| add = valproic acid
| info =
* This combination of drugs may have possible synergistic effects. However, the pharmacokinetic drug interactions will influence the plasma levels. Dose adaptation will be recommended for this combination.
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* Valproate can increase lamotrigine plasma levels significantly by inhibiting lamotrigine’s glucuronidation. This effect of valproate is dose-dependent.<ref name=”bazire”> Bazire S, Psychotropic Drug Directory 2007, HealthComm UK Limited, Aberdeen, 2007. </ref>
* Very slow titration of lamotrigine is recommended because reports of lamotrigine-related skin rashes. <ref> {{Pubmed|16225978|Chang CC at al, Toxic epidermal necrolysis with combination lamotrigine and valproate in bipolar disorder. Prog Neuropsychopharmacol Neuropsych. Biol Psychiatry. 2006 Jan;30(1):147-50}}</ref>
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