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Effect of Withania somnifera glycowithanolides on a rat model of tardive dyskinesia


Effect of Withania somnifera glycowithanolides on a rat model of tardive dyskinesia



Phytomedicine: International Journal of PhytoTherapy and Phytopharmacology 9(2): 167-170



ISSN/ISBN: 0944-7113

PMID: 11995951

DOI: 10.1078/0944-7113-00089

Withania somnifera glycowithanolides (WSG) were investigated for their preventive effect on the animal model of tardive dyskinesia (TD), induced by once daily administration of the neuroleptic, haloperidol (1.5 mg/kg, i.p.), for 28 days. Involuntary orofacial movements (chewing movements, tongue protusion and buccal tremors) were assessed as TD parameters. WSG (100 and 200 mg, p.o.), administered concomitantly with haloperidol for 28 days, inhibited the induction of the neuroleptic TD. Haloperidol-induced TD was also attenuated by the antioxidant, vitamin E (400 and 800 mg/kg, p.o.), but remained unaffected by the GABA-mimetic antiepileptic agent, sodium valproate (200 and 400 mg/kg, p.o.), both agents being administered for 28 days like WSG. The results indicate that the reported antioxidant effect of WSG, rather than its GABA-mimetic action, may be responsible for the prevention of haloperidol-induced TD.

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Accession: 003724139

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