Does lacosamide aggravate Lennox-Gastaut syndrome? Report on three consecutive cases.

Lennox-Gastaut syndrome is an intractable epileptic encephalopathy, with most patients experiencing daily seizures despite therapy with multiple antiepileptic drugs. New treatments need to be tested to define their efficacy in this syndrome. Lacosamide is a new antiepileptic drug recently approved for the treatment of partial-onset seizures.