Evaluation of Acute Oral Toxicity, Anti-inflammatory and Anti-hyperuricemic Activities of the Herbal Remedy Lamgout in Mice
Doan Hong Tham
Faculty of Pharmacy, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam.
Nguyen Thi Bach Tuyet
Faculty of Pharmacy, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam.
Nguyen Thi Hong Phuc *
Faculty of Pharmacy, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam.
*Author to whom correspondence should be addressed.
Abstract
Background: Lamgout is a herbal preparation containing eight medicinal plants and was experimentally evaluated for acute oral toxicity, anti-inflammatory activity, and uric acid-lowering effects in mice.
Methods: Swiss albino mice were used for the experiments. Acute oral toxicity was assessed following administration of the maximum feasible volume of Lamgout extract, corresponding to 182 g of dried herbal material/kg, and the animals were observed for up to 14 days. Anti-inflammatory activity was evaluated using a 1% carrageenan-induced hind paw oedema model after oral treatment with Lamgout at 7 or 14 g of dried herb/kg; diclofenac 5 mg/kg served as the positive control. Anti-hyperuricaemic activity was assessed in potassium oxonate-induced hyperuricaemia using preventive and therapeutic models, with allopurinol 10 mg/kg as the positive control.
Results: No mortality or observable signs of acute toxicity occurred following administration of 182 g of dried herb/kg. Both Lamgout doses significantly reduced carrageenan-induced paw oedema compared with the model control. In the preventive model, plasma uric acid was reduced by 37.07% and 50.86% at 7 and 14 g/kg, respectively, compared with 82.76% for allopurinol. In the therapeutic model, the corresponding reductions were 40.52%, 43.97%, and 74.14%.
Conclusion: Under the experimental conditions used, Lamgout showed no observable acute oral toxicity at the maximum tested dose and demonstrated anti-inflammatory and uric acid-lowering activities in mice. Further studies are required to characterise its active constituents, mechanisms, longer-term safety, and potential clinical relevance.
Keywords: Lamgout, acute oral toxicity, anti-inflammatory, hyperuricaemia, carrageenan, potassium oxonate