Effect of eboracin on convulsive seizures in mice: enhancement of myoclonus and inhibition of the tonic phase.

Eboracin, a substituted trioxyindenopyrrole, inhibited the tonic component of convulsive seizures induced in mice by pentylenetetrazol, electroshock or auditory stimulation. Single doses decreased the incidence of tonic-clonic seizures (ED50=28-35 mg/kg); complete inhibition of tonus followed doses of 40-150 mg/kg. A dose of 75-150 mg/kg of eboracin prolonged the duration and increased the severity of the myoclonic component of seizures induced by pentylenetetrazol.