Antidiarrheal Activity of the Fruits ofVitex doniana. in Laboratory Animals

The effect of different doses of the aqueous extract of Vitex doniana. Sweet (Verbenaceae) on acetylcholine and histamine-induced contractions on isolated guinea pig ileum was evaluated. The effect of the extract on intestinal peristalsis and castor oil–induced diarrhea in mice was also studied. The results showed that the extract possess a concentration-dependent inhibition of both acetylcholine and histamine-induced contractions. The extract (at doses of 150–650 mg/kg) also inhibited gastric peristalsis in mice fed charcoal meal and significantly protected mice against castor oil–induced diarrhea. Phytochemical screening of the extract revealed the presence of anthraquinones, flavonoids, saponins, sterols, and tannins. The findings in this study indicate that the aqueous extract of V. doniana. fruits may contain some pharmacologically active components that perhaps will be useful as antidiarrheal agents. The findings have also validated the use of this plant in traditional cure of diarrhea.