Results: In acute toxicity study, no treatment related death or toxic signs were observed with NK administration. In
the repeated dose study, no significant differences in body weight changes, food / water intake, haematology,
clinical biochemistry and electrolytes content were observed between control and NK groups. No gross
pathological findings and difference in relative organ weights were observed between control and NK treated rats.
Histopathological examination revealed no abnormalities with NK treatment.