JOURNAL ARTICLE

CNS depressant activity of Lecaniodiscus cupanioides

O K Yemitan, O O Adeyemi
Fitoterapia 2005, 76 (5): 412-8
15955638
The aqueous root extract of Lecaniodiscus cupanioides was used to study the central nervous system depressant activity pattern of the plant. The extract protected mice from strychnine-induced convulsion at 400 mg/kg p.o. and 100 mg/kg i.p. A dose-dependent prolongation of seizure latency was produced at 400 mg/kg, p.o. and 100 mg/kg i.p. for strychnine-induced seizure; and at 400 mg/kg p.o. and 100 mg/kg i.p. for picrotoxin-induced seizure. Moreover, the CNS depressant activity of the extract (200 mg/kg p.o. and 50 mg/kg i.p.) was demonstrated by a significant prolongation of 40 mg/kg, pentobarbitone sleeping time, and significant reduction in exploratory behavior of mice at a dose of 400 mg/kg p.o., with both effects comparable to effects produced by 4 mg/kg chlorpromazine. Acute oral toxicity test, up to 14 days, did not produce any visible signs of toxicity; however, acute (24 h) i.p toxicity test produced a dose-dependent mortality with LD50 of 455.2 mg/kg.

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