In this study we tested a hypothesis that dopamine and GABA receptor-stimulating agents given together might mutually potentiate their anticonvulsant activities. To test this hypothesis, experiments were performed on free-moving rabbits with epileptiform activity evoked by cortical application of ouabain. After combined treatment with apomorphine and GHBA 3 out of 6 animals displayed no EEG epileptiform activity, and in the remaining 3 rabbits this activity was greatly reduced. A combined pretreatment with apomorphine and GHBA abolished epileptiform EEG activity during the first hour and shortened it during the second hour, but not significantly. Apomorphine given together with amino-oxyacetic acid before ouabain completely abolished the epileptiform activity in 4 out of 6 animals. In the remaining 2 rabbits the latency of ouabain affect was prolonged, the epileptiform activity during the first hour was abolished, and it was markedly decreased during the next 2 hr (significantly from controls or groups receiving apomorphine or amino-oxyacetic acid). Phenytoin was less potent than apomorphine with GHBA or apomorphine given together with AOAA. The animals' behavior was observed.