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Pharmacological Treatment of Drug-Resistant Epilepsy in Adults: a Practical Guide

  • Epilepsy (CW Bazil, Section Editor)
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Abstract

More than 30 % of adults with epilepsy do not fully control on the currently available antiepileptic drugs (AEDs). For these and many other patients, combinations of agents, often possessing different mechanisms of actions, are employed with the aim of achieving seizure freedom or the best available prognosis in terms of reduced seizure numbers and severity. This review discusses my own approach to optimising outcomes in as many of these patients as possible by adjusting the drug burden using a combination of two, three or sometimes four or more AEDs. Modes of drug action are reviewed and practical strategies for treating different patients with drug-resistant epilepsy have been explored. Only for sodium valproate with lamotrigine is there good evidence of synergism. The final part of this practical paper consists of six individual illustrative cases with appropriate comments.

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References

Papers of particular interest, published recently, have been highlighted as: • Of importance

  1. Brodie MJ, Barry SJE, Bamagous GA, Norrie J, Kwan P. Patterns of treatment response in newly diagnosed epilepsy. Neurology. 2012;78:1548–54.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  2. Kwan P, Schachter SC, Brodie MJ. Drug-resistant epilepsy. N Engl J Med. 2011;369:919–26.

    Article  Google Scholar 

  3. Kwan P, Brodie MJ. Definition of refractory epilepsy: defining the indefinable? Lancet Neurol. 2010;9:27–9.

    Article  PubMed  Google Scholar 

  4. Luoni C, Bisuilli F, Canevini MP, De Sarro G, Fattore C, Galimberti CP, et al. Determinates of health-related quality of life in pharmacoresistant epilepsy: results from a large multicenter study of consenting enrolled patients using validated quantitative assessments. Epilepsia. 2011;52:2181–91.

    Article  PubMed  Google Scholar 

  5. Brodie MJ, Covanis A, Lerche H, Perucca E, Sills GJ, White S. Antiepileptic drug therapy: does mechanism of action matter? Epilepsy Behav. 2011;21:331–41.

    Article  PubMed  Google Scholar 

  6. Kwan P, Brodie MJ. Combination therapy in epilepsy. When and what to use. Drugs. 2006;66:1817–29.

    Article  CAS  PubMed  Google Scholar 

  7. French JA, Faught E. Rational polytherapy. Epilepsia. 2009;50 suppl 8:63–8.

    Article  CAS  PubMed  Google Scholar 

  8. St Louis EK. Truly “rational” polytherapy: maximising efficacy and minimizing drug interactions, drug load and adverse effects. Curr Neuropharm. 2009;7:96–105.

    Article  CAS  Google Scholar 

  9. Gidal BE. Do new antiepileptic drugs with novel mechanisms of action suggest reconsideration of rational polytherapy? US Neurology. 2010;6:70–6.

    Article  Google Scholar 

  10. Brodie MJ, Sills GJ. Combining antiepileptic drugs—rational polytherapy? Seizure. 2011;20:369–75.

    Article  PubMed  Google Scholar 

  11. Brigo F, Ausserer H, Tezzon F, Nardone R. When one plus one make three: the quest for rational antiepileptic polytherapy with supraadditive anticonvulsant efficacy. Epilepsy Behav. 2013;27:439–42.

    Article  PubMed  Google Scholar 

  12. Poulos NP, Warner LN, Humphrys LN, Williams S. Comparative efficacy of combination drug therapy in refractory epilepsy. Neurology. 2012;78:62–8.

    Article  Google Scholar 

  13. Margolis JM, Chu BC, Wang ZJ, Copher R, Cavazos JE. Effectiveness of antiepileptic drug combination therapy for partial-onset seizures based on mechanisms of action. JAMA Neurol. 2014;71:885–93. This paper provides objective evidence in support of rational polytherapy by combining antiepileptic drugs with different mechanisms of action.

    Article  Google Scholar 

  14. Kwan P, Arzimanoglou A, Berg AT, Brodie MJ, Hauser WA, Mathern G, et al. Definition of drug resistant epilepsy: consensus proposal by the ad hoc Task Force of the ILAE Commission on Therapeutic Strategies. Epilepsia. 2010;51:1069–77.

    Article  CAS  PubMed  Google Scholar 

  15. Tellez-Zenteno JF, Hernandez-Ronquillo A, Buckley S, Zahagun R, Rizvi S. A validation of the new definition of drug-resistant epilepsy by the International League Against Epilepsy. Epilepsia. 2014;55:829–34. This is one of a number of studies supporting the clinical value of the International League Against Epilepsy’s definition of drug resistant epilepsy.

    Article  PubMed  Google Scholar 

  16. Hao X, Goldberg D, Kelly K, Stephen LJ, Kwan P, Brodie MJ. Uncontrolled epilepsy is not necessarily the same as drug-resistant epilepsy: differences between populations with newly diagnosed epilepsy and chronic epilepsy. Epilepsy Behav. 2013;29:4–6.

    Article  PubMed  Google Scholar 

  17. Brodie MJ, Yuen AWC. Lamotrigine substitution study: evidence for synergism with sodium valproate? 105 Study Group. Epilepsy Res. 1997;26:423–32.

    Article  CAS  PubMed  Google Scholar 

  18. Pisani F, Otero G, Russo MF, Di Perri R, Perucca E, Richens A. The efficacy of valproate-lamotrigine comedication in refractory complex partial seizures: evidence for a pharmacodynamic interaction. Epilepsia. 1999;40:1141–6.

    Article  CAS  PubMed  Google Scholar 

  19. Shandra A, Shandra P, Kaschenko O, Matagne A, Stohr T. Synergism of lacosamide with established antiepileptic drugs in the 6 Hz seizure model in mice. Epilepsia. 2013;54:1167–75.

    Article  CAS  PubMed  Google Scholar 

  20. Stephen LJ, Forsyth M, Kelly K, Brodie MJ. Antiepileptic drug combinations—have newer agents altered clinical outcomes? Epilepsy Res. 2012;98:194–8.

    Article  CAS  PubMed  Google Scholar 

  21. Errington AC, Stohr T, Heers C, Lees G. The investigational anticonvulsant lacosamide selectively enhances slow inactivation of voltage gated sodium channels. Molecular Pharmacol. 2008;73:157–69.

    Article  CAS  Google Scholar 

  22. Hebeisen S, Pires N, Loureiro AI, Bonifacio MJ, Palma N, Whymont A, et al. Eslicarbazepine and the enhancement of slow inactivation of voltage-gated sodium channels: a comparison with carbamazepine, oxcarbazepine and lacosamide. Neuropharmacology. 2015;89:122–35.

    Article  CAS  PubMed  Google Scholar 

  23. Sake JK, Herbert D, Isojarvi J, Doty P, De Backer M, Davies K, et al. A pooled analysis of lacosamide clinical trial data grouped by mechanisms of action of concomitant antiepileptic drugs. CNS Drugs. 2010;24:1055–68.

    Article  CAS  PubMed  Google Scholar 

  24. Gil-Nagel A, Elger C, Ben-Menachem E, Halasz P, Lopes-Lima J, Gabbai AA, et al. Efficacy and safety of eslicarbazepine acetate as add-on treatment in patients with focal seizures: integrated analysis of pooled data from double-blind phase III clinical studies. Epilepsy. 2013;54:98–107.

    Article  CAS  Google Scholar 

  25. Stephen LJ, Kelly K, Parker P, Brodie MJ. Adjuctive lacosamide: 5 years clinical experience. Epilepsy Res. 2014;108:1385–91.

    Article  CAS  PubMed  Google Scholar 

  26. Brodie MJ. Practical use of newer antiepileptic drugs as adjunctive therapy in focal epilepsy. CNS Drugs. 2015;11:893–904.

    Article  Google Scholar 

  27. Brodie MJ, Kwan P. Therapeutics: newer drugs for focal epilepsy in adults. Br Med J. 2012;344:e345. doi:10.1136/bmj.e345.

    Article  Google Scholar 

  28. Lin JJ, Mula M, Hermann BP. Uncovering the neurobehavioural comorbidities of epilepsy over a life span. Lancet. 2012;380:1180–92.

    Article  PubMed  Google Scholar 

  29. Stephen LJ, Parker P, Kelly K, Wilson EA, Leach V, Brodie MJ. Adjunctive pregabalin for uncontrolled partial-onset seizures: findings from a prospective audit. Acta Neurol Scand. 2011;124:142–5.

    Article  CAS  PubMed  Google Scholar 

  30. Brodie MJ, Kwan P. Current position of phenobarbital in epilepsy and its future. Epilepsia. 2012;53 suppl 8:40–6.

    Article  CAS  PubMed  Google Scholar 

  31. Gauthier AC, Mattson RH. Clobazam: a safe, efficacious and newly discovered therapeutic for epilepsy. CNS Neurosci Therap. 2015;21:543–8.

    Article  CAS  Google Scholar 

  32. Brodie MJ. Antiepileptic drug therapy: the story so far. Seizure. 2010;19:650–5.

    Article  PubMed  Google Scholar 

  33. McDonagh J, Stephen LJ, Dolan F, Parks S, Dutton G, Kerry K, et al. Peripheral retinal dysfunction in patients taking vigabatrin. Neurology. 2003;61:1690–4.

    Article  CAS  PubMed  Google Scholar 

  34. Leach JP, Brodie MJ. Tiagabine. Lancet. 1998;351:203–7.

    Article  CAS  PubMed  Google Scholar 

  35. Brodie MJ, Kelly K, Stephen LJ. Prospective audits with new antiepileptic drugs: insights into response. Epilepsy Behav. 2014;31:73–6.

    Article  PubMed  Google Scholar 

  36. Klein P, Schiemann J, Sperling M, Whitesides J, Liang W, Stalvey T, et al. A randomized, double-blind, placebo-controlled, multicenter, parallel-group study to evaluate the efficacy and safety of adjunctive brivaracetam in adult patients with uncontrolled partial-onset seizure. Epilepsia. 2015;56:1890–8.

    Article  CAS  PubMed  Google Scholar 

  37. Wuttke TV, Seebohn G, Bail S, Maljevic S, Lerche H. The new anticonvulsant retigabine favors voltage-dependent opening of the Kv 7.2 (KCNQ2) channel by binding to its activation gate. Molecular Pharmacol. 2005;67:1009–17.

    Article  CAS  Google Scholar 

  38. Gunthorpe MJ, Large CH, Sankar R. The mechanism of action of retigabine (ezogabine): a first in class K+ channel opener for the treatment of epilepsy. Epilepsia. 2012;53:412–24.

    Article  CAS  PubMed  Google Scholar 

  39. Rogawski MA. Revisiting AMPA receptors as an antiepileptic drug target. Epilepsy Curr. 2011;11:56–63.

    Article  PubMed  PubMed Central  Google Scholar 

  40. French JA, Krauss G, Wechsler R, Wang X, Di Ventura B, Brandt C, et al. Adjunctive perampanel for treatment of drug-resistant primary generalized tonic-clonic seizures in patients with idiopathic generalized epilepsy: a double-blind randomized placebo-controlled phase III trial. Neurology. 2015;85:950–7.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  41. Klitgaard H, Matagne A, Nicholas JM, Gillard M, Lamberty Y, De Ryck M, et al. Brivaracetam: rationale for discovery and preclinical profile of a selective SV2A ligand for epilepsy treatment. Epilepsia. 2016;57:538–48.

    Article  PubMed  Google Scholar 

  42. Yates SL, Fakhoury T, Lang W, Eckhardt K, Borghs S, D’Souza J. An open-label, prospective, exploratory study of patients with epilepsy switching from levetiracetam to brivaracetam. Epilepsy Behav. 2015;52:165–8.

    Article  PubMed  Google Scholar 

  43. Gowers WR. Epilepsy and other chronic convulsive diseases. London: Churchill; 1881. p. 201.

    Google Scholar 

  44. Friedman D, Devinsky O. Cannibinoids in the treatment of epilepsy. N Engl J Med. 2015;373:1048–58.

    Article  CAS  PubMed  Google Scholar 

  45. Mohanraj R, Brodie MJ. Diagnosis refractory epilepsy: response to sequential treatment schedules. Eur J Neurol. 2006;13:277–82.

    Article  CAS  PubMed  Google Scholar 

  46. Hitiris N, Mohanraj R, Norrie J, Sills GJ, Brodie MJ. Predictors of pharmacoresistant epilepsy. Epilepsy Res. 2007;75:192–6.

    Article  CAS  PubMed  Google Scholar 

  47. Mohanraj R, Brodie MJ. Outcomes in newly diagnosed localization related epilepsies. Seizure. 2005;14:318–23.

    Article  PubMed  Google Scholar 

  48. Brodie MJ, Barry SJE, Bamagous GA, Kwan P. Effect of dosage failed of the first antiepileptic drug on subsequent outcome. Epilepsia. 2013;54:195–8.

    Google Scholar 

  49. Kwan P, Brodie MJ. Early identification of refractory epilepsy. N Engl J Med. 2000;342:314–9.

    Article  CAS  PubMed  Google Scholar 

  50. Deckers CL, Hekster YA, Keyser A, Meinardi H, Renier WO. Reappraisal of polytherapy in epilepsy: a critical review of drug load and adverse effects. Epilepsia. 1997;38:570–5.

    Article  CAS  PubMed  Google Scholar 

  51. Besag FM, Berry DJ, Pool F, Newbery JE, Subez B. Carbamazepine toxicity with lamotrigine: pharmacokinetic or pharmacodynamic interaction? Epilepsia. 1998;39:183–7.

    Article  CAS  PubMed  Google Scholar 

  52. Duncan S, Brodie MJ. Sudden expected death in epilepsy. Epilepsy Behav. 2011;21:344–51.

    Article  PubMed  Google Scholar 

  53. Tomson T, Surges R, Delamont R, Haywood S, Hesdorffer DC. Who to target in sudden unexpected death in epilepsy ? Risk factors, biomarkers, and intervention study design. Epilepsia. 2016;57 suppl 1:4–16. Recent discussion of risk factors, biomarkers and study designs to prevent sudden unexpected death in epilepsy.

    Article  PubMed  Google Scholar 

  54. Piedad J, Rickards H, Besag FM, Cavana AE. Beneficial and adverse psychotropic effects of antiepileptic drugs in patients with epilepsy. CNS Drugs. 2012;26:319–35.

    Article  CAS  PubMed  Google Scholar 

  55. Brodie MJ, Besag FM, Ettinger AB, Mula M, Gobbi G, Comai S, et al. Epilepsy, antiepileptic drugs and aggression: an evidence-based review. Pharmacological Rev. 2016;68:563–602. Evidence based review of epilepsy, antiepileptic drugs and aggression relevant to drug choice in patients with pharmacoresistant epilepsy.

    Article  Google Scholar 

  56. Tomson T, Marson A, Boon P, Canevini MP, Covanis A, Gaily E, et al. Valproate in the treatment of epilepsy in girls and women of childbearing potential. Epilepsia. 2015;6:100–19. International League Against Epilepsy’s review of the issues surrounding the use of sodium valproate in young women with epilepsy.

    Google Scholar 

  57. Hernandez-Diaz S, Smith CL, Shen A, Mittendorf R, Hauser WA, Yerby M, et al. Comparative safety of antiepileptic drugs during pregnancy. Neurology. 2011;78:1692–9.

    Article  Google Scholar 

  58. Brodie MJ, Minzter S, Pack AM, Gidal BE, Vecht C, Schmidt D. Enzyme induction with antiepileptic drugs: cause for concern? Epilepsia. 2013;54:11–27. Review of the relevance of enzyme induction with antiepileptic drugs in everyday clinical practice.

    Article  CAS  PubMed  Google Scholar 

  59. Vecht CJ, Wagner GL, Wilms EB. Interactions between antiepileptic and chemotherapeutic drugs. Lancet Neurol. 2003;2:404–9.

    Article  CAS  PubMed  Google Scholar 

  60. Geerts A, Brouwer O, Stroink H, Van Donselaar C, Peters G, Peters B, et al. Onset of intractability and its course over time: the Dutch study of epilepsy in children. Epilepsia. 2012;53:744–51.

    Article  Google Scholar 

  61. Dichter MA. Emerging concepts in the pathogenesis of epilepsy and epileptogenesis. Ann Neurol. 2009;66:443–7.

    Google Scholar 

  62. Loscher W, Schmidt D. Modern antiepileptic drug development has failed to deliver: ways out of the current dilemma. Epilepsia. 2011;52:657–78.

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Correspondence to Martin J. Brodie.

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Conflict of Interest

Martin J. Brodie has received advisory board and speaker’s bureau fees from Eisai Ltd., UCB Pharma, GlaxoSmithKline and Lundbeck. Dr. Brodie has also received advisory board fees from Bial, GW Pharmaceuticals and Takeda as well as speaker’s bureau fees from Sanofi Aventis. He also has received paid travel accommodations from UCB Pharma, GlaxoSmithKline and Lundbeck.

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This article does not contain any studies with human or animal subjects performed by any of the authors.

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This article is part of the Topical Collection on Epilepsy

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Brodie, M.J. Pharmacological Treatment of Drug-Resistant Epilepsy in Adults: a Practical Guide. Curr Neurol Neurosci Rep 16, 82 (2016). https://doi.org/10.1007/s11910-016-0678-x

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