<prompt> The presence of a drug on left side in the Log DRC tells about itsPotencySafetyEfficacyTherapeutic index  <response>: Dose Response Curve DRC - Hyperbola shape Log Dose Response Curve log DRC - Sigmoid shape Three impoant Parameters a Potency- Potency tells which drug produces more effect on lower dose. Left side graph is of more potent drug as compared to right side graph b Efficacy- Efficacy tells maximum effect of a drug. It is seen from height of DRC. c Slope- Slope tells the safety of the drug as more is the slope less is the safety. Quantal DRC - It tells about effect of drug in population Therapeutic index TI of a drug LD50 ED50 - TI is index of measure of safety. 