Long-term monotherapy with lamotrigine in newly diagnosed epilepsy in adults.

Lamotrigine (LTG) as both effective against a wide range of seizure types and epileptic syndromes and well tolerated drug is being used in mono--as well as in polytherapy of pharmacoresistant epilepsy. The aim of this study was to evaluate the efficacy, safety and neuropsychological functioning after LTG (mean daily dose: 316 mg) as long-term monotherapy (12 mo) in 24 young adult out-patients (22.5 ys) with newly recognised and not-previously treated epilepsy in an open, non-comparative trial. 67% of patients were responders (above 50% reduction in seizure frequency) and 42% reported seizures remission. The best were results in patients with generalised convulsive fits (87% with remission). Adverse events in the early phase of medication in 21% of patients typically concerned CNS and gastrointestinal system (headache, asthenia, insomnia, nausea, gastric aches) and resolved spontaneously without treatment discontinuation. Biochemical examinations were normal and transient leucopenia and diminishion of MCV were clinically not significant. Neurodynamic abilities, neuropsychological examination results, memory verbal and visual tests and organic evaluation in organic triada tests did not show deterioration after LTG treatment. Slight difficulties in abstractive and operative thinking and some focal symptoms of fronto-temporal origin should be considered a result of drug but also the epilepsy per se. No significant differences in latencies and amplitudes of evoked potentials (VEP, BAEP, SEP and especially ERP-300) were measured after LTG. Preliminary results obtained in this study supported good efficacy and tolerability and especially lack of unfavourable influence of LTG on neuropsychological functioning in young previously untreated patients with epilepsy.