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  • Title: Effect of dopaminergic and GABA-ergic drugs given alone or in combination on the anticonvulsant action of phenobarbital and diphenylhydantoin in the electroshock test in mice.
    Author: Kleinrok Z, Czuczwar SJ, Kozicka M.
    Journal: Epilepsia; 1980 Oct; 21(5):519-29. PubMed ID: 6252007.
    Abstract:
    In the electroshock test--taking hind-limb tonic extension as the end point--apomorphine (10 mg/kg) exerted no effect on the anticonvulsant action of phenobarbital (PB; 20 mg/kg) or diphenylhydantoin (DPH; 8 mg/kg); amantadine (25 and 100 mg/kg) decreased that of DPH, while L-DOPA (500 mg/kg) and d,l-amphetamine (10 mg/kg) potentiated the action of both anticonvulsants. Fluphenazine (4 mg/kg) had no influence on the effects of the two anticonvulsants, but haloperidol lessened that of DPH. All GABA-ergic stimulants used, i.e., gamma-hydroxybutyric acid (GHBA/250 mg/kg), baclofen (2.5 and 10 mg/kg) and aminooxoacetic acid (AOAA; 15 and 20 mg/kg) potentiated the action of PB; the action of DHP was unaffected by these drugs except for AOAA (20 mg/kg). The combined treatment with dopaminergic and GABA-ergic stimulants, being ineffective in terms of anticonvulsant activity, resulted in a marked potentiation of the action of the anticonvulsants tested in this study. The most distinct potentiation was noted in the case of PB, baclofen (1 mg/kg), and amantadine (25 mg/kg).
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