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Ficus deltoidea Jack (Moraceae) leaf extract is used as an antidiabetic in traditional medicine. Its widespread usage is reflected by the available preparations in the present commercial market. The efficacy of other Ficus species has not been entirely satisfactory and many antidiabetic herbs have demonstrated poor safety profiles. This study examined hypoglycemic and toxicity profiles of F. deltoidea leaf extract in rodent models. Extracts of dried powdered leaves were obtained using methanol solution, n-hexane, chloroform, and n-butanol. These extracts were orally administered to rodents. Their blood glucose and insulin levels, acute and subchronic toxicity, biochemical and histological profiles of liver and kidney were determined. Methanol extract exhibited blood glucose lowering activity in mildly insulin resistant diabetic rats as well as in normoglycemic mice unlike hydrophilic butanol subextract which only expressed its activity in normoglycemic mice. Methanol extract could contain both insulin receptor sensitization and secretagogue constituents. Different from toxic chloroform and hexane subextracts, hydrophilic methanol extract gave zero percent mortality up to 6400 mg/kg in 14 days. It did not induce liver and kidney toxicity upon four-week consumption at 200 mg/kg. The methanol extract possessed mixed antidiabetic actions and exhibited a low level of oral toxicity.

Evaluation of Hypoglycemic Activity and Toxicity Profiles of the Leaves of Ficus deltoidea in Rodents