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Aloe ferox Mill., Xanthorrhoeaceae, resin is the solid residue obtained by evaporating the latex that drains from the leaves transversally cut. Aloe ferox has been used in folk medicine as anti-inflammatory, immunostimulant, anti-bacterial, anti-fungal, antitumor, laxative and to heal wounds and burns. The effects of the oral administration of A. ferox resin (10, 25, 50, 100 and 200mg/kg) were evaluated on intestinal transit in mice and its acute toxicity (5.0g/kg) in Wistar rats. The hydroxyanthracene derivatives present in the resin were expressed as aloin, identified by thin layer chromatography and quantified by spectrophotometry. The aloin (Rf 0.35) was identified and the percentage of hydroxyanthracene derivates expressed as aloin was 33.5%. A. ferox resin extract (50, 100 and 200mg/kg) increased the gastrointestinal motility at a 30min interval at 93.5, 91.8 and 93.8%, respectively, when compared to control group (46.5%). A single oral dose of the A. ferox resin extract did not induce signs of toxicity or death. Thus, the results demonstrate that A. ferox has laxative activity and that it is nontoxic, since LD50 could not be estimated and it is possibly higher than 5.0g/kg

Acute toxicity and laxative activity of Aloe ferox resin