1. Median lethal dose(LD50):
The amount(mg/kg) of a drug or other substance that, when administered to a group of
experimental animals, will kill 50 per cent of the group in 14Days.
2. Median lethal concentration(LC50):
Form exposure to a certain concentration and time (generally takes 1 to 4 hours), 50 per cent of the group of experimental animals will die in 14 Days.