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Comparative Efficacy and Tolerability of Antiepileptic Drugs for Refractory Focal Epilepsy Systematic Review and Network Meta-Analysis reveals the need for long-term comparator trials.
MedLine Citation:
PMID:  23351090     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
To evaluate the comparative efficacy (50% reduction in seizure frequency) and tolerability (premature withdrawal due to adverse events) of antiepileptic drugs (AEDs) for refractory epilepsy. METHODS: We searched Cochrane Central Register of Controlled Trials (Cochrane Library 2009, issue 2) including Epilepsy Group's specialised register; MEDLINE (1950 to March 2009); EMBASE (1980 to March 2009); and Current Contents Connect (1998 to March 2009) to conduct a systematic review of published studies, developed a treatment network and undertook a network meta-analysis. RESULTS: Forty-two eligible trials with 6346 patients and 12 interventions, including placebo, contributed to the analysis. Only two direct drug comparator trials were identified, the remaining 40 trials being placebo-controlled. Conventional random-effects meta-analysis indicated all drugs were superior in efficacy to placebo (overall odds ratio [OR] 3.78 [95% CI 3.14 to 4.55]) but did not permit firm distinction between drugs on the basis of the efficacy or tolerability. A Bayesian network meta-analysis prioritised oxcarbazepine, topiramate and pregabalin on the basis of short-term efficacy. However, sodium valproate, levetiracetam, gabapentin and vigabatrin were prioritised on the basis of short-term efficacy and tolerability, with the caveat that vigabatrin is recognised as being associated with serious visual disturbance with chronic use. CONCLUSION: Of the wide range of AEDs licensed for the treatment of refractory epilepsy, sodium valproate, levetiracetam, and gabapentin demonstrated the best balance of efficacy and tolerability. Until regulators mandate greater use of active-comparator trials with longer term follow-up, network meta-analysis provides the only available means to quantify these clinically important parameters.
Authors:
Pritesh N Bodalia; Anthony M Grosso; Reecha Sofat; Raymond J Macallister; Liam Smeeth; Soraya Dhillon; Juan-Pablo Casas; David Wonderling; Aroon D Hingorani
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-28
Journal Detail:
Title:  British journal of clinical pharmacology     Volume:  -     ISSN:  1365-2125     ISO Abbreviation:  Br J Clin Pharmacol     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503323     Medline TA:  Br J Clin Pharmacol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013 The Authors. British Journal of Clinical Pharmacology © 2013 The British Pharmacological Society.
Affiliation:
Genetic Epidemiology Group, Department of Epidemiology & Public Health, Division of Population Health, University College London, London, WC1E 6BT; Department of Pharmacy, Royal National Orthopaedic Hospital, Stanmore, Middlesex, HA7 4LP.
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