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Heavy metals in Ayurvedic formulations have been used for centuries with claimed efficacy and safety. However, concerns are often raised about the toxicity due to heavy metals used in Ayurvedic formulations. The aim of present study is to explore the effect of Calcury tablet, Energic-31 capsule and Basanta Kusumakara Rasa (BKR) on neurobehavioral activity and oxidative stress in rats. Male wistar rats weighing 200-250 g were used and divided into normal control, positive control (mercury chloride, lead acetate, cadmium chloride, sodium arsenite, each 10 mg/kg, p.o for 28 days) and treated group (Calcury tablets at doses of 130, 650, 1300 mg/kg, Energic-31 capsule at doses of 150, 750, 1500 mg/kg and BKR at doses of 26, 130, 260 mg/kg, p.o. for 28 days). After performing the behavioural parameters on the 29(th) day, homogenate of rat's brain was used to determine malondialdehyde (MDA) and glutathione (GSH) levels and heavy metal level in brain. Results showed that there were no significant change in cognitive function, motor coordination, MDA and GSH levels as compared to normal control group at all doses of Calcury tablet, Energic-31 capsule and Basant Kusumkar Rasa. However, heavy metals level in rat's brain was higher as compared to normal control group at all doses of Calcury tablet, Energic-31 capsule and BKR. In conclusion, Calcury tablet, Energic-31 capsule and BKR in doses equivalent to the human dose does not have appreciable adverse effects on brain which demonstrates the non-toxic nature of metal based Ayurvedic formulations.

Evidence for safety of Ayurvedic herbal, herbo-metallic and Bhasma preparations on neurobehavioral activity and oxidative stress in rats