Association of lamotrigine and valproate in refractory epilepsies of children and adolescents Associação de lamotrigina e valproato de sódio no tratamento de epilepsia refratária em crianças e adolescentes

OBJECTIVE: To evaluate the efficacy or eventual side-effects of the association of lamotrigine and sodium valproate in the control of refractory epilepsies. METHOD: A retrospective analysis of 37 children with a mean age of 12 years taking exclusivelly lamotrigine and sodium valproate. Efficacy of seizure control was considered satisfactory if there was a reduction in seizures >50% or total control. RESULTS: The association of lamotrigine and sodium valproate was considered satisfactory in 65% of the studied children, independent of seizure type. Total seizure control was obtained in 33% and 35% had an unsatisfactory response or remained unchanged. Primary generalized tonic clonic seizures were the most common type with 84% of day-time seizures having a good response to treatment. Side-effects were seen in 11% of patients and the most common was tremor. CONCLUSION: Total or satisfactory control of seizures was seen in the majority of patients and side-effects were uncommon.<br>OBJETIVO: Avaliar a eficácia ou eventuais efeitos colaterais da associação de lamotrigina e valproato de sódio no controle de epilepsia refrataria. MÉTODO: Análise retrospectiva de 37 crianças e adolescentes com idade média de 12 anos tratadas exclusivamente com lamotrigina e valproato de sódio. A eficácia do controle de crises foi considerada satisfatória se o controle das crises foi >50% ou total. RESULTADOS: A associação de lamotrigina e valproato de sódio foi considerada satisfatória em 65%, independente do tipo de crise. O controle total de crises foi obtido em 33% e em 35% a resposta foi insatisfatória ou permaneceu inalterada. Crise generalizada primaria tônico clonica foi o mais comum, com 84% das crises ocorrendo durante o dia, com boa resposta ao tratamento. Efeitos colaterais foram vistos em 11% dos pacientes, sendo tremor o mais freqüente. CONCLUSÃO: Controle total ou satisfatório das crises ocorreu na maioria dos pacientes, sendo pouco freqüente os efeitos colaterais

Hypersensitivity reactions to antiepileptic drugs in children

Background: Antiepileptic drugs (AEDs) can cause hypersensitivity reactions in children. These reactions are mainly cutaneous, self-limiting, and benign, but life-threatening severe cutaneous adverse reactions can occur. Infections can lead to skin eruptions and mimic drug hypersensitivity reactions, if a drug is taken at the same time. The aims of our study were to confirm or rule out the diagnosis of hypersensitivity reactions to AEDs in children and to detect an infection which mimics these reactions. Methods: A prospective survey was conducted in a group of 100 children with histories of hypersensitivity reactions to AEDs by performing patch tests, delayed-reading intradermal test, and, in case of negative results, challenge test. In all children, a study was performed to detect infections by viruses or Mycoplasma pneumoniae. Results: Maculopapular exanthema and delayed-appearing urticaria were the most reported hypersensitivity reactions to AEDs. Sixty-six (66%) of 100 children had confirmed hypersensitivity reactions to AEDs. Fifty-nine children had positive patch test. No children had positive challenge tests. The most common AEDs causing hypersensitivity reactions were carbamazepine (45.4%) and lamotrigine (43.6%). Thirty-two children had positive tests for viruses or M pneumoniae, and nine of them had also a positive allergy work-up. Conclusion: Considering that there are no specific tests to distinguish between a viral infection and hypersensitivity reactions to AEDs in the acute phase, a diagnostic work-up should be performed in all children with suspected hypersensitivity reactions to AEDs, as well as infectious agent study, to remove a false label of hypersensitivity