<prompt> Therapeutic index is a measure of which of the parameters?EfficacyAdverse effectsSafetyPotency  <response>: Therapeutic index is a measure of the margin of safety of a drug. Therapeutic index Median lethal doseMedian effective dose. One estimate of a drugs margin of safety is the ratio LD50ED50, the therapeutic index, which is a statement of how selective the drug is in producing its desired versus its adverse effects. 