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Background  The herbal preparation DAS-77, used for the treatment of various ailments in Nigeria, contains the milled bark of  Mangifera indica  L. and root of  Carica papaya  L. Toxicological assessment of the preparation was carried out in this study.    Methods  In the acute toxicity study, DAS-77 was administered to mice  p.o.  up to 20 g/kg in divided doses and  i.p.  at 250–3000 mg/kg. Mortality within 24 h was recorded. In the chronic toxicity study, rats were treated  p.o.  for 90 days at doses of 80, 400 (therapeutic dose, TD) and 2000 mg/kg. By 90 days, animals were sacrificed and blood samples collected for hematological and biochemical analysis. Organs were harvested for weight determination, antioxidants and histopathological assessments.    Results  DAS-77 did not produce any lethality administered  p.o.  up to 20 g/kg in divided doses but the  i.p.  LD 50  was 1122.0 mg/kg. At TD, DAS-77 produced significant ( p  < 0.05) reductions in body weight, food intake and K + , and increases in ovary weight, neutrophils and HDL, which were reversible. Histopathological presentations were generally normal. Effects at the other doses were comparable to those at TD except for reversible increases in antioxidants in the liver, kidney and testes, and sperm abnormality, and reductions in liver enzymes, sperm motility and count.    Conclusions  Findings in this study revealed that DAS-77 is relatively safe with the potential for enhancing  in vivo  antioxidant activity. However, possibly reversible side-effects include electrolyte imbalance and sterility in males.

A 90 day chronic toxicity study of Nigerian herbal preparation DAS-77 in rats