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The antidiarrhoeal effects of Lantana camara ethanol leaf and stem extracts were compared in Wistar rats. The phytochemical and acute toxicity tests were also determined. The extracts were evaluated for castor oil- induced diarrhoea and enteropooling as well as intestinal transit in rats. The ethanol stem extract produced significant (P &lt; 0.05), while the ethanol leaf extract produced significant (P &lt; 0.01) dose dependent protection on rats against castor oil induced diarrhoea. The stem extract inhibited intestinal transit time and caused significant (P &lt; 0.05), while leaf extract caused significant (P &lt; 0.01) dose related inhibition of castor oil induced enteropooling in rats, comparable to the standard drugs. The leaf and stem extracts significantly and dose dependently delayed the onset of castor oil induced diarrhoea, decreased the frequency of defecation and reduced the severity of diarrhoea in rats. The ethanol leaf and stem extracts of L. camara significantly and dose dependently decreased the volume of intestinal fluid accumulation in the castor oil induced enteropooling. The distance travelled by charcoal meal in intestinal transit time was also reduced. The oral LD50 values obtained were greater than 5000 mg/kg in rats. These findings suggest that both ethanol leaf and stem extracts of Lantana camara may contain some biologically active ingredients that are active for the treatment of diarrhoea in Nigerian herbal traditional medicine. However, the leaf extract has more antidiarrhoeal activities compared to the stem extract in castor oil-induced diarrhoeal in Wistar rats.

Comparative assessment of the anti-diarrhoeal effects of the ethanol leaf and stem extracts of lantana camara in Wistar rats