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1.
Arq. neuropsiquiatr ; 61(4): 988-990, Dec. 2003. tab
Article in Portuguese | LILACS | ID: lil-352438

ABSTRACT

OBJETIVO: é relatar a eficácia da vigabatrina no controle das convulsões, bem como as alterações eletrencefalográficas em crianças com esclerose tuberosa e síndrome de West. MÉTODO: Estudo retrospectivo, com dados clínicos, de neuroimagem e de eletrencefalograma. RESULTADOS: Sete pacientes foram acompanhados e o tempo médio de seguimento foi 10 anos. Dos pacientes, quatro eram do sexo feminino e todos eram de cor branca. A média de idade de início das convulsões foi 3,4 meses. Todos usaram associações de vários anticonvulsivantes; no mínimo duas drogas por esquema terapêutico, e cada paciente utilizou pelo menos dois esquemas diferentes. O uso de vigabatrina como monoterapia ou em associação iniciou em média aos 7 anos de idade ou 4 anos após início dos sintomas. Cinco dos sete pacientes que iniciaram vigabatrina ficaram sem crise. CONCLUSÃO: Vigabatrina mostrou-se eficaz no controle das crises, levando a um melhor prognóstico


Subject(s)
Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Anticonvulsants/therapeutic use , Epilepsy/drug therapy , Spasms, Infantile/drug therapy , Tuberous Sclerosis/drug therapy , Vigabatrin/therapeutic use , Age of Onset , Anticonvulsants/pharmacology , Electroencephalography/drug effects , Epilepsy/complications , Follow-Up Studies , Prognosis , Retrospective Studies , Spasms, Infantile/complications , Treatment Outcome , Tuberous Sclerosis/complications , Vigabatrin/pharmacology
2.
Arq. neuropsiquiatr ; 57(4): 916-20, dez. 1999. graf
Article in English | LILACS | ID: lil-249288

ABSTRACT

Since anticonvulsants have been used for treating neuralgias, an interest has arisen to experimentally test vigabatrin for its gabaergic mechanism of action. For this, 41 Wistar rats were used, and in 25 of them a constractive sciatic neuropathy was induced (Bennet & Xie model). For testing pain symptoms, spontaneous (Scratching) and evoked behaviors to noxious (46 degrees Celsius) and non-noxious (40 degrees Celsius) thermal stimuli were quatified. Moreover, a comparative pharmacological study of vigabatrin with other analgesic anticonvulsant drugs was also performed. The results showed a possible dose-dependent analgesic effect of vigabatrin (gamma-vinyl-GABA) on experimental neuropathic pain, as shown vy the significant (p<0.05) decreasing effect of vigabatrin on scratching and by its significant (p>0.05) increasing effect on the latency of the right hindpaw withdrawal of the animals to noxious thermal stimulus. This was corroborated by similar findings with analgesic anticonvulsants (carbamazepine, phenytoin and valproic acid). This possible and not yet described analgesic effect of vigabatrin seems not to be opioid mediated.


Subject(s)
Animals , Rats , Analgesics/pharmacology , Anticonvulsants/pharmacology , Neuralgia/drug therapy , Vigabatrin/pharmacology , Carbamazepine/pharmacology , Chronic Disease , Phenytoin/pharmacology , Rats, Wistar , Valproic Acid/pharmacology
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