Lacosamide add-on treatment in refractory focal epilepsy: experience of a single tertiary center

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Akyol Gürses A., Genç E., Genç B. O.

Journal of the Turkish Epilepsi Society, vol.26, no.2, pp.88-93, 2020 (ESCI)

  • Publication Type: Article / Article
  • Volume: 26 Issue: 2
  • Publication Date: 2020
  • Journal Name: Journal of the Turkish Epilepsi Society
  • Journal Indexes: Emerging Sources Citation Index (ESCI), TR DİZİN (ULAKBİM)
  • Page Numbers: pp.88-93
  • Gazi University Affiliated: Yes


Objectives: Lacosamide is a third-generation antiepileptic agent that selectively enhances slow inactivation of sodium channels that take

part in generation and propagation of action potentials and results in the diminution of neuronal excitability. Because of this new mechanism

of action, it is expected to be efficacious in patients with drug-resistant epilepsy. In this study, we aimed to assess the efficacy and

tolerability of lacosamide add-on treatment in refractory epilepsy patients by presenting our experience in a tertiary referral center.

Methods: Medical records of refractory focal epilepsy patients who were followed in epilepsy outpatient clinic between October 2014 and

May 2017 were retrospectively reviewed in this study. Patients who were treated with add-on lacosamide and completed minimum of six

months follow-up period were included. ≥50% reduction in seizure frequency was defined as treatment response.

Results: In this study, 88 patients were included. The percentage of seizure-free patients after six months follow-up was 4.6% and the treatment

response rate was 55.6%. We also evaluated the effect of concomitant use of sodium channel blockers, the presence of abnormal

findings on magnetic resonance imaging and the introduction stage of lacosamide. No significant difference was observed in the response

rate regarding the mentioned parameters. 19% of the patients reported side effects, the majority of which were dizziness, vertigo and somnolence.

None of them discontinued treatment because of side effects.

Conclusion: Our findings suggest that lacosamide add-on therapy is effective in refractory focal epilepsy and has an appropriate tolerability

and safety profile since none of the patients stopped treatment due to side effects.

Keywords: Refractory epilepsy; lacosamide; responder rate.