A Comparison of Rectal Diazepam Gel and Placebo for Acute Repetitive Seizures
Fritz E. Dreifuss, M.D., N. Paul Rosman, M.D., James C. Cloyd, Pharm.D., John M. Pellock, M.D., Ruben I. Kuzniecky, M.D., Warren D. Lo, M.D., Fumisuke Matsuo, M.D., Gregory B. Sharp, M.D., Joan A. Conry, M.D., Donna C. Bergen, M.D., and Walter E. Bell, Ph.D.
Background Acute repetitive seizures are readily recognizableepisodes involving increased seizure frequency. Urgent treatmentis often required. Rectal diazepam gel is a promising therapy.
Methods We conducted a randomized, double-blind, parallel-group,placebo-controlled study of home-based treatment for acute repetitiveseizures. Patients were randomly assigned to receive eitherrectal diazepam gel, at doses ranging from 0.2 to 0.5 mg perkilogram of body weight on the basis of age, or placebo. Childrenreceived one dose at the onset of acute repetitive seizuresand a second dose four hours later. Adults received three doses one dose at onset, and two more doses 4 and 12 hoursafter onset. Treatment was administered by a care giver, suchas a parent, who had received special training. The number ofseizures after the first dose was counted for 12 hours in childrenand for 24 hours in adults.
Results Of 125 study patients (64 assigned to diazepam and 61to placebo) with a history of acute repetitive seizures, 91(47 children and 44 adults) were treated for an exacerbationof seizures during the study period. Diazepam treatment wassuperior to placebo with regard to the outcome variables relatedto efficacy: reduced seizure frequency (P<0.001) and improvedglobal assessment of treatment outcome by the care giver (frequencyand severity of seizures and drug toxicity) (P<0.001). Posthoc analysis showed diazepam to be superior to placebo in reducingseizure frequency in both children (P<0.001) and adults (P=0.02),but only in children was it superior with regard to improvementin global outcome (P<0.001). The time to the first recurrenceof seizures after initial treatment was longer for the patientsreceiving diazepam (P<0.001). Thirty-five patients reportedat least one adverse effect of treatment; somnolence was themost frequent. Respiratory depression was not reported.
Conclusions Rectal diazepam gel, administered at home by trainedcare givers, is an effective and well-tolerated treatment foracute repetitive seizures.
Source Information
From the Department of Neurology, University of Virginia, Charlottesville (F.E.D.); the Division of Pediatric Neurology, New England Medical Center, Boston (N.P.R.); the College of Pharmacy, University of Minnesota, Minneapolis (J.C.C.); the Department of Neurology, Medical College of Virginia, Richmond (J.M.P.); the Department of Neurology, University of Alabama at Birmingham, Birmingham (R.I.K.); the Department of Pediatrics, Children's Hospital, Columbus, Ohio (W.D.L.); the Department of Neurology, University of Utah, Salt Lake City (F.M.); the Department of Neurology, Arkansas Children's Hospital, Little Rock (G.B.S.); the Department of Neurology, Children's National Medical Center, Washington, D.C. (J.A.C.); the Department of Neurological Sciences, RushPresbyterianSt. Luke's Medical Center, Chicago (D.C.B.); and the National Institutes of Health, Bethesda, Md. (W.E.B.).
Address reprint requests to Dr. Rosman at the Division of Pediatric Neurology, NEMC 330, Floating Hospital for Children, 750 Washington St., Boston, MA 02111.
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