Effectiveness of intermittent diazepam prophylaxis in febrile seizures: long-term prospective controlled study.

The efficacy of intermittent rectal diazepam prophylaxis is assessed in the prevention of febrile seizures. In a prospective randomized cohort trial, 139 children (77 girls, 62 boys) who experienced a first febrile seizure were allocated to two groups: group A, which received intermittent diazepam (n = 68), and group B, which received no prophylaxis (n = 71). All children had a 3-year follow-up. The inclusion criteria were no personal history of afebrile seizures, normal neurodevelopment, no previous anticonvulsant therapy, and age between 6 months and 3 years. Each group was stratified to low, intermediate, and high risk according to the available clinical data. The 36-month recurrence rates in the no-prophylaxis group were 83% in high-risk patients, 55% in intermediate-risk patients, and 46% in low-risk patients. In the prophylaxis group, the recurrence rates were reduced in all risk groups: 38%, 35%, and 33%, respectively. Intermittent diazepam prophylaxis reduces the recurrence rate mainly in high-risk children provided that sufficient doses are given on time and adequately.