Abstract
Background
Once adults with long-standing idiopathic generalised epilepsy have achieved stable seizure remission, patients or physicians may attempt to discontinue their antiepileptic drug treatment. To date, risk of subsequent seizure relapse across the four idiopathic generalised epilepsy syndromes is largely unknown, and so are the clinical variables associated.
Methods
For this retrospective observational study, 256 adult outpatients with idiopathic generalised epilepsy were evaluated. Data were obtained from outpatient charts and, if possible, from additional telephone or mail interviews.
Results
In 84 patients (33%), antiepileptic medication was discontinued at least once. Median patient age at antiepileptic drug withdrawal was 33 years, and median duration of subsequent follow-up was 20 years. Seizures recurred in 46% of patients after a median latency of 11 months. Following multivariable analysis, seizure relapse was independently associated with short duration of seizure remission beforehand. If medication was withdrawn after < 5 years of seizure freedom, two-thirds of patients had a seizure relapse, while among those in remission for ≥ 5 years, only one-third relapsed.
Conclusions
Discontinuation of antiepileptic drug treatment can be successful in every other adult with long-standing idiopathic generalised epilepsy. Short duration of prior seizure remission appears to be a relevant predictor of seizure recurrence.
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Acknowledgements
The authors are most grateful to Dieter Janz who dedicated his work life to epilepsy and, in particular, to delineation, classification and treatment of IGE. For more than half a century, he collected respective patient data which provided the basis for this and previous studies. Dieter Janz passed away in 2016 aged 96 years. Bernd J Vorderwülbecke was funded by grants from von Bodelschwingh Foundation and Deutsche Forschungsgemeinschaft (DFG 422589384). Philine Senf was funded by grants from Else Kröner Fresenius Foundation and Heidehof Foundation. Martin Holtkamp holds the “Friedrich-von-Bodelschwingh Endowed Professorship for Clinical and Experimental Epileptology” at the Department of Neurology, Charité–Universitätsmedizin Berlin.
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Martin Holtkamp received speaker’s honoraria and/or consultancy fees from Bial, Desitin, Eisai, LivaNova, Novartis, and UCB. All the other authors declare that they have no conflicts of interest.
Ethical standards
The study was approved by the institutional review board at Charité–Universitätsmedizin Berlin and was, therefore, conducted in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All interviewed patients or their next-of-kin gave written informed consent.
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Vorderwülbecke, B.J., Kirschbaum, A., Merkle, H. et al. Discontinuing antiepileptic drugs in long-standing idiopathic generalised epilepsy. J Neurol 266, 2554–2559 (2019). https://doi.org/10.1007/s00415-019-09457-z
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DOI: https://doi.org/10.1007/s00415-019-09457-z