Gabapentin as add-on therapy in children with refractory partial seizures: a 12-week, multicentre, double-blind, placebo-controlled study. Gabapentin Paediatric Study Group

Epilepsia. 1999 Aug;40(8):1147-54. doi: 10.1111/j.1528-1157.1999.tb00833.x.


Purpose: To evaluate the efficacy and safety of gabapentin (Neurontin; GBP) as add-on therapy for refractory partial seizures in paediatric patients aged 3-12 years.

Methods: After a 6-week baseline period, 247 patients (54 centres) entered a 12-week double-blind phase and were randomized to receive either GBP (t.i.d., titrated to 23-35 mg/kg/ day) or placebo. Seizure activity and type were recorded daily. Efficacy variables included Response Ratio (RRatio), responder rate, and percentage change in frequency (PCH) for all partial seizures; PCH and RRatio for individual types of partial seizures; and investigator and parent/guardian global assessments of seizure frequency and patient well-being.

Results: RRatio for all partial seizures was significantly lower (better) for GBP-treated patients (p = 0.0407). Responder rate favored GBP, but the difference between treatment groups was not statistically significant. Median PCH for all partial seizures for the GBP treatment group (-17.0%) was better than that for the placebo group (-6.5%). Median PCH for specific seizure types showed GBP to be most effective in controlling complex partial seizures (-35%) and secondarily generalized seizures (-28%) when compared with placebo (-12%, +13%, respectively). A greater percentage of GBP-treated patients exhibited improvement according to investigator and parent/guardian global assessments, with a statistically significant difference observed in the parent/guardian global assessment of seizure-frequency reduction (p = 0.046). Three GBP patients and one placebo patient were seizure free during the double-blind treatment period. GBP was well tolerated.

Conclusions: GBP was effective and well tolerated as an add-on therapy for partial seizures in paediatric patients with previously drug-resistant seizures.

Publication types

  • Clinical Trial
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetates / therapeutic use*
  • Age Factors
  • Amines*
  • Anticonvulsants / therapeutic use*
  • Child
  • Child, Preschool
  • Cyclohexanecarboxylic Acids*
  • Double-Blind Method
  • Drug Therapy, Combination
  • Epilepsies, Partial / drug therapy*
  • Female
  • Gabapentin
  • Humans
  • Male
  • Placebos
  • Treatment Outcome
  • gamma-Aminobutyric Acid*


  • Acetates
  • Amines
  • Anticonvulsants
  • Cyclohexanecarboxylic Acids
  • Placebos
  • gamma-Aminobutyric Acid
  • Gabapentin