growth inhibition, commonly used effective concentration: EC (effective concentration) to represent the poison on the test of biological toxicity. The EC50, which means half of the effective concentration, is the concentration that leads to the 50 percent of the animals that have been tested for ...
Obviously the "selectivity of a drug to elicit a desired effect rather than toxicity" is somewhat different between these substances, but the therapeutic index would remain the same. Therapeutic range (or window) In Katzung, the therapeutic window is defined as "The r...