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Abstract
Background: Gabapentin is an anticonvulsant that is being used for an increasing number of off-label indications. The purpose of this study is to document the clinical manifestations and outcomes of gabapentin exposures reported to poison centers. Methods: A multicenter prospective observational study of all gabapentin exposures reported to three poison centers was conducted between 4/1/98 and 4/1/2000. Cases involving gabapentin only were evaluated. Results: There were 20 cases with gabapentin as the sole substance in doses ranging from 50 mg to 35 g. Ten of the 20 cases involved children and adolescents. Clinical effects developed early and resolved within 10 hours in most patients. Seven cases were managed in the home with only observation. Four of these patients remained asymptomatic. Effects reported in the three symptomatic patients were drowsiness (3) and ataxia (1). Thirteen patients were managed in a health care facility. Nine were symptomatic with reported effects of drowsiness (6), dizziness (3), nausea/vomiting (2), tachycardia (2), and hypotension (2). None of the patients were admitted for medical care. Conclusion: In this cases series, gabapentin exposures caused no or minimal toxicity.