lamotrigine [ 3,5-diamino-6-(2,3-dichlorophenyl)-as-triazine,BW-430C,Crisomet,Desitin Brand of Lamotrigine,Faes Brand of Lamotrigine,Glaxo Wellcome Brand of Lamotrigine,GlaxoSmithKline Brand of Lamotrigine,Juste Brand of Lamotrigine,Labileno,Lamictal,Lamiktal ] blocks voltage-gated sodium and calcium channels and inhibits release of excitatory neurotransmitters such as glutamate; structure given in first source