Abstract:
:Nicotinamide is a ligand of the benzodiazepine receptor and has been reported to have anticonvulsant activity. In addition, our previous clinical experience has raised the possibility that it may also potentiate the action of barbiturates. Therefore, we have examined the anticonvulsant activity and neurotoxicity of nicotinamide alone and in combination with phenobarbital in mice. Nicotinamide had its maximal anticonvulsant effect 15 min and its maximal sedative effect 45 min after intraperitoneal injection. At 15 min, the median effective dose was 586.5 mg/kg against bicuculline and 2,019 mg/kg against pentylenetetrazol. Nicotinamide was ineffective against maximal electroshock. It had a sedative effect, with a median toxic dose of 874.8 mg/kg by the Rotorod Toxicity Test at 45 min. At doses that were ineffective by themselves (0.01 effective dose) nicotinamide potentiated the anticonvulsant activity of phenobarbital against bicuculline and pentylenetetrazol, but the toxicity was not potentiated and therefore the therapeutic index of phenobarbital was improved by nicotinamide. These results suggest that nicotinamide may be useful as a therapeutic adjunct for the treatment of epilepsy with phenobarbital or primidone.
journal_name
Epilepsiajournal_title
Epilepsiaauthors
Bourgeois BF,Dodson WE,Ferrendelli JAdoi
10.1111/j.1528-1157.1983.tb04885.xsubject
Has Abstractpub_date
1983-04-01 00:00:00pages
238-44issue
2eissn
0013-9580issn
1528-1167journal_volume
24pub_type
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