Differential selectivity of several barbiturates on experimental seizures and neurotoxicity in the mouse.

Abstract:

:Six barbiturates with diverse time-action characteristics--thiopental, pentobarbital, butabarbital, phenobarbital, diphenylbarbiturate, and barbital--were evaluated for "anticonvulsant" and "neurotoxic" effects. For the former, the MES test, clonic seizures induced by pentylenetetrazol, 90 mg/kg, s.c., and maximal seizures produced by pentylenetetrazol, 200 mg/kg, s.c., were employed. For the latter, we used a rotorod technique. Time to peak activity in the MES test was employed as the time for other tests. Pentobarbital required at least neurotoxic doses to produce substantial "anticonvulsant" activity, its protective index ranging from 0.79 to 0.98 in the three tests. Among the drugs tested, phenobarbital and diphenylbarbiturate exhibited the most favorable protective indices, ranging from 2.71 to 3.41 for phenobarbital and from 3.85 to 5.0 for diphenylbarbiturate. Barbital, another drug with a prolonged duration of action, exhibited a range from 0.84 to 2.81. Although a prolonged duration of action is an important characteristic for antiepileptic activity, this property does not confer per se a favorable protective index.

journal_name

Epilepsia

journal_title

Epilepsia

authors

Raines A,Blake GJ,Richardson B,Gilbert MB

doi

10.1111/j.1528-1157.1979.tb04783.x

subject

Has Abstract

pub_date

1979-04-01 00:00:00

pages

105-13

issue

2

eissn

0013-9580

issn

1528-1167

journal_volume

20

pub_type

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