Skip to main content

Anticonvulsant Agents: Cannabidiol and Fenfluramine

  • Living reference work entry
  • First Online:
NeuroPsychopharmacotherapy

Abstract

Developmental and epileptic encephalopathies (DEEs) are a rarely occurring heterogeneous group of devastating epilepsy syndromes that occur in childhood and have the characteristics of cognitive dysfunction, pharmacoresistant seizures, and a poor prognosis. Dravet syndrome (DS) is a well-established DEE and is characterized by early onset of treatment-refractory seizures alongside impairments to cognition, behavior, and motor control. Even when multiple conventional anti-seizure medications are administered, seizures are still difficult to control, and there is an increasing need for tolerable and effective treatments. This also applies to Lennox–Gastaut syndrome (LGS), which involves a heterogenous group of etiologies where there is no single genetic cause and which may also include structural brain damage. This literature review highlights the recent therapeutic changes of DS and LGS and summarizes the latest evidence-based research, including pivotal data from the clinical development of cannabidiol and fenfluramine. Both drugs are generally well tolerated and efficacious and may be a route to advances in DEE treatments.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Institutional subscriptions

References

  • Agency EM. Epidyolex. https://www.ema.europa.eu/en/medicines/human/EPAR/

  • Arzimanoglou A, French J, Blume WT, Cross JH, Ernst JP, Feucht M, Genton P, Guerrini R, Kluger G, Pellock JM, Perucca E, Wheless JW. Lennox-Gastaut syndrome: a consensus approach on diagnosis, assessment, management, and trial methodology. Lancet Neurol. 2009;8:82–93.

    Article  Google Scholar 

  • Asadi-Pooya AA. Lennox-Gastaut syndrome: a comprehensive review. Neurol Sci. 2018;39:403–14.

    Article  Google Scholar 

  • Britch SC, Babalonis S, Walsh SL. Cannabidiol: pharmacology and therapeutic targets. Psychopharmacology. 2021;238:9–28.

    Article  CAS  Google Scholar 

  • Ceulemans B, Boel M, Leyssens K, Van Rossem C, Neels P, Jorens PG, Lagae L. Successful use of fenfluramine as an add-on treatment for Dravet syndrome. Epilepsia. 2012;53:1131–9.

    Article  CAS  Google Scholar 

  • Ceulemans B, Schoonjans AS, Marchau F, Paelinck BP, Lagae L. Five-year extended follow-up status of 10 patients with Dravet syndrome treated with fenfluramine. Epilepsia. 2016;57:e129–34.

    Article  CAS  Google Scholar 

  • Cooper MS, McIntosh A, Crompton DE, McMahon JM, Schneider A, Farrell K, Ganesan V, Gill D, Kivity S, Lerman-Sagie T, McLellan A, Pelekanos J, Ramesh V, Sadleir L, Wirrell E, Scheffer IE. Mortality in Dravet syndrome. Epilepsy Res. 2016;128:43–7.

    Article  Google Scholar 

  • Crespel A, Gelisse P, Macorig G, Nikanorova M, Ferlazzo E, Genton P. Lennox-Gastaut syndrome. In: Bureau M, Genton P, Dravet C, Delgado-Escueta AV, Guerrini R, Tassinari CA, Thomas P, Wolf P, editors. Epileptic syndromes in infancy, childhood and adolescence. 6th ed. John Libbey Eurotext; 2019.

    Google Scholar 

  • Cross JH, Auvin S, Falip M, Striano P, Arzimanoglou A. Expert opinion on the management of Lennox-Gastaut Syndrome: treatment algorithms and practical considerations. Front Neurol. 2017;8:505.

    Article  Google Scholar 

  • Devinsky O, Cross JH, Laux L, Marsh E, Miller I, Nabbout R, Scheffer IE, Thiele EA, Wright S. Trial of cannabidiol for drug-resistant seizures in the Dravet syndrome. N Engl J Med. 2017;376:2011–20.

    Article  CAS  Google Scholar 

  • Devinsky O, Patel AD, Cross JH, Villanueva V, Wirrell EC, Privitera M, Greenwood SM, Roberts C, Checketts D, VanLandingham KE, Zuberi SM, Group GS. Effect of cannabidiol on drop seizures in the Lennox-Gastaut syndrome. N Engl J Med. 2018;378:1888–97.

    Article  CAS  Google Scholar 

  • Dravet C. The core Dravet syndrome phenotype. Epilepsia. 2011;52(Suppl 2):3–9.

    Article  Google Scholar 

  • Gray RA, Whalley BJ. The proposed mechanisms of action of CBD in epilepsy. Epileptic Disord. 2020;22:10–5.

    PubMed  Google Scholar 

  • Gunning B, Mazurkiewicz-BeĹ‚dziĹ„ska M, Chin RFM, Bhathal H, Nortvedt C, Dunayevich E, Checketts D. Cannabidiol in conjunction with clobazam: analysis of four randomized controlled trials. Acta Neurol Scand. 2021;143:154–163.

    Google Scholar 

  • Lagae L, Sullivan J, Knupp K, Laux L, Polster T, Nikanorova M, Devinsky O, Cross JH, Guerrini R, Talwar D, Miller I, Farfel G, Galer BS, Gammaitoni A, Mistry A, Morrison G, Lock M, Agarwal A, Lai WW, Ceulemans B. Fenfluramine hydrochloride for the treatment of seizures in Dravet syndrome: a randomised, double-blind, placebo-controlled trial. Lancet. 2020;394:2243–54.

    Article  Google Scholar 

  • Miller I, Scheffer IE, Gunning B, Sanchez-Carpintero R, Gil-Nagel A, Perry MS, Saneto RP, Checketts D, Dunayevich E, Knappertz V, Group GS. Dose-ranging effect of adjunctive oral cannabidiol vs placebo on convulsive seizure frequency in Dravet syndrome: a randomized clinical trial. JAMA Neurol. 2020;77:613–21.

    Google Scholar 

  • Nabbout R, Dirani M, Teng T, Bianic F, Martin M, Holland R, Chemaly N, Coque N. Impact of childhood Dravet syndrome on care givers of patients with DS, a major impact on mothers. Epilepsy Behav. 2020a;108:107094.

    Article  Google Scholar 

  • Nabbout R, Mistry A, Zuberi S, Villeneuve N, Gil-Nagel A, Sanchez-Carpintero R, Stephani U, Laux L, Wirrell E, Knupp K, Chiron C, Farfel G, Galer BS, Morrison G, Lock M, Agarwal A, Auvin S, FaiRe DSSG. Fenfluramine for treatment-resistant seizures in patients with Dravet syndrome receiving stiripentol-inclusive regimens: a randomized clinical trial. JAMA Neurol. 2020b;77:300–8.

    Article  Google Scholar 

  • Nariai H, Duberstein S, Shinnar S. Treatment of epileptic encephalopathies: current state of the art. J Child Neurol. 2018;33:41–54.

    Article  Google Scholar 

  • Patel AD, Mazurkiewicz-Beldzinska M, Chin RF, Gil-Nagel A, Gunning B, Halford JJ, Mitchell W, Scott Perry M, Thiele EA, Weinstock A, Dunayevich E, Checketts D, Devinsky O. Long-term safety and efficacy of add-on cannabidiol in patients with Lennox-Gastaut syndrome: results of a long-term open-label extension trial. Epilepsia. 2021a;62:2228–39.

    Article  CAS  Google Scholar 

  • Patel S, Grinspoon R, Fleming B, Skirvin LA, Wade C, Wolper E, Bruno PL, Thiele EA. The long-term efficacy of cannabidiol in the treatment of refractory epilepsy. Epilepsia. 2021b;62:1594–603.

    Article  CAS  Google Scholar 

  • Polster T. Individualized treatment approaches: Fenfluramine, a novel antiepileptic medication for the treatment of seizures in Dravet syndrome. Epilepsy Behav. 2019;91:99–102.

    Article  Google Scholar 

  • Resnick T, Sheth RD. Early diagnosis and treatment of Lennox-Gastaut syndrome. J Child Neurol. 2017;32:947–55.

    Article  Google Scholar 

  • Scheffer IE, Berkovic S, Capovilla G, Connolly MB, French J, Guilhoto L, Hirsch E, Jain S, Mathern GW, Moshe SL, Nordli DR, Perucca E, Tomson T, Wiebe S, Zhang YH, Zuberi SM. ILAE classification of the epilepsies: position paper of the ILAE Commission for Classification and Terminology. Epilepsia. 2017;58:512–21.

    Article  Google Scholar 

  • Scheffer IE, Halford JJ, Miller I, Nabbout R, Sanchez-Carpintero R, Shiloh-Malawsky Y, Wong M, Zolnowska M, Checketts D, Dunayevich E, Devinsky O. Add-on cannabidiol in patients with Dravet syndrome: results of a long-term open-label extension trial. Epilepsia. 2021;62:2505–2517.

    Google Scholar 

  • Schoonjans AS, Ceulemans B. A critical evaluation of fenfluramine hydrochloride for the treatment of Dravet syndrome. Expert Rev Neurother. 2021:1–14.

    Google Scholar 

  • Specchio N, Pietrafusa N, Doccini V, Trivisano M, Darra F, Ragona F, Cossu A, Spolverato S, Battaglia D, Quintiliani M, Luigia Gambardella M, Rosati A, Mei D, Granata T, Dalla Bernardina B, Vigevano F, Guerrini R. Efficacy and safety of Fenfluramine hydrochloride for the treatment of seizures in Dravet syndrome: a real-world study. Epilepsia. 2020a;61:2405–14.

    Article  CAS  Google Scholar 

  • Specchio N, Pietrafusa N, Ferretti A, Trivisano M, Vigevano F. Successful use of fenfluramine in nonconvulsive status epilepticus of Dravet syndrome. Epilepsia. 2020b;61:831–3.

    Article  Google Scholar 

  • Strzelczyk A, Kalski M, Bast T, Wiemer-Kruel A, Bettendorf U, Kay L, Kieslich M, Kluger G, Kurlemann G, Mayer T, Neubauer BA, Polster T, Herting A, von Spiczak S, Trollmann R, Wolff M, Irwin J, Carroll J, Macdonald D, Pritchard C, Klein KM, Rosenow F, Schubert-Bast S. Burden-of-illness and cost-driving factors in Dravet syndrome patients and carers: a prospective, multicenter study from Germany. Eur J Paediatr Neurol. 2019a;23:392–403.

    Article  Google Scholar 

  • Strzelczyk A, Pringsheim M, Mayer T, Polster T, Klotz KA, Muhle H, Alber M, Trollmann R, Spors H, Kluger G, Kurlemann G, Schubert-Bast S. Efficacy, tolerability, and retention of fenfluramine for the treatment of seizures in patients with Dravet syndrome: compassionate use program in Germany. Epilepsia. 2021a;62:2518–27.

    Article  Google Scholar 

  • Strzelczyk A, Schubert-Bast S. Therapeutic advances in Dravet syndrome: a targeted literature review. Expert Rev Neurother. 2020;20:1065–79.

    Article  CAS  Google Scholar 

  • Strzelczyk A, Schubert-Bast S. Expanding the treatment landscape for Lennox-Gastaut syndrome: current and future strategies. CNS Drugs. 2021;35:61–83.

    Article  Google Scholar 

  • Strzelczyk A, Schubert-Bast S, Bast T, Bettendorf U, Fiedler B, Hamer HM, Herting A, Kalski M, Kay L, Kieslich M, Klein KM, Kluger G, Kurlemann G, Mayer T, Neubauer BA, Polster T, von Spiczak S, Stephani U, Trollmann R, Wiemer-Kruel A, Wolff M, Irwin J, Carroll J, Pritchard C, Rosenow F. A multicenter, matched case-control analysis comparing burden-of-illness in Dravet syndrome to refractory epilepsy and seizure remission in patients and caregivers in Germany. Epilepsia. 2019b;60:1697–710.

    Article  Google Scholar 

  • Strzelczyk A, Schubert-Bast S, Reese JP, Rosenow F, Stephani U, Boor R. Evaluation of health-care utilization in patients with Dravet syndrome and on adjunctive treatment with stiripentol and clobazam. Epilepsy Behav. 2014;34:86–91.

    Article  Google Scholar 

  • Strzelczyk A, Schubert-Bast S, Simon A, Wyatt G, Holland R, Rosenow F. Epidemiology, healthcare resource use, and mortality in patients with probable Lennox-Gastaut syndrome: a population-based study on German health insurance data. Epilepsy Behav. 2021b;115:107647.

    Article  Google Scholar 

  • Sullivan J, Specchio N, Devinsky O, Auvin S, Perry MS, Strzelczyk A, Gil-Nagel A, Dai D, Galer BS, Gammaitoni AR. Fenfluramine significantly reduces day-to-day seizure burden by increasing number of seizure-free days and time between seizures in patients with Dravet syndrome: A time-to-event analysis. Epilepsia. 2021.

    Google Scholar 

  • Thiele E, Marsh E, Mazurkiewicz-Beldzinska M, Halford JJ, Gunning B, Devinsky O, Checketts D, Roberts C. Cannabidiol in patients with Lennox-Gastaut syndrome: interim analysis of an open-label extension study. Epilepsia. 2019;60:419–28.

    Article  CAS  Google Scholar 

  • Thiele EA, Marsh ED, French JA, Mazurkiewicz-Beldzinska M, Benbadis SR, Joshi C, Lyons PD, Taylor A, Roberts C, Sommerville K, Group GS. Cannabidiol in patients with seizures associated with Lennox-Gastaut syndrome (GWPCARE4): a randomised, double-blind, placebo-controlled phase 3 trial. Lancet. 2018;391:1085–96.

    Article  CAS  Google Scholar 

  • Wirrell EC, Laux L, Donner E, Jette N, Knupp K, Meskis MA, Miller I, Sullivan J, Welborn M, Berg AT. Optimizing the diagnosis and management of Dravet syndrome: recommendations from a north American consensus panel. Pediatr Neurol. 2017;68(18–34):e13.

    Google Scholar 

  • Wirrell EC, Nabbout R. Recent advances in the drug treatment of Dravet syndrome. CNS Drugs. 2019;33:867–81.

    Google Scholar 

  • Zogenix. Zogenix announces positive top-line results from global pivotal phase 3 trial of FINTEPLA® for the Treatment of Lennox-Gastaut Syndrome. 2020.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Adam Strzelczyk .

Editor information

Editors and Affiliations

Section Editor information

Rights and permissions

Reprints and permissions

Copyright information

© 2022 Springer Nature Switzerland AG

About this entry

Check for updates. Verify currency and authenticity via CrossMark

Cite this entry

Strzelczyk, A., Frey, K., Rosenow, F., Schubert-Bast, S. (2022). Anticonvulsant Agents: Cannabidiol and Fenfluramine. In: Riederer, P., Laux, G., Nagatsu, T., Le, W., Riederer, C. (eds) NeuroPsychopharmacotherapy. Springer, Cham. https://doi.org/10.1007/978-3-319-56015-1_467-1

Download citation

  • DOI: https://doi.org/10.1007/978-3-319-56015-1_467-1

  • Received:

  • Accepted:

  • Published:

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-56015-1

  • Online ISBN: 978-3-319-56015-1

  • eBook Packages: Springer Reference MedicineReference Module Medicine

Publish with us

Policies and ethics