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Clerodendrum is a genus of about 500 species belongs to the family Lamiaceae. Several species of this genus have been proved for the treatment of various diseases. Clerodendrum thomsoniae Balf.f were selected in this study; according to the literature available, there is no systematic toxicity studies for this plant were described. The current study was therefore carried out to evaluate the acute and sub-acute toxicity in mice and rats. The acute oral toxicity study was performed in mice following OECD guidelines 425, and the sub-acute toxicity was performed in male and female rats following OECD guidelines 407. The results showed that mice given a single dose of up to 2000 mg/kg orally did not show any toxicity signs or mortality. In the sub-acute toxicity analysis in rats, 3 specific daily doses of 150, 300, and 600 mg/kg for 28 days did not induce any major changes to the hematological and biochemical parameters. Histopathological studies revealed normal architecture that did not indicate any morphological disturbances. In our study, no deaths or any signs of toxicity were found in acute and subacute toxicity studies after oral administration according to OECD guidelines, which concluded that ethyl acetate extract of Clerodendrum thomsoniae Balf (EACT) could use for in vivo biological activity studies in laboratory animals to explore its various medicinal activity before study in human subjects.


Ashraf, Muhammed V. K.;  Kalaichelvan, V. K.;  Venkatachalam, V. V.

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