In that case, I think that pharmokinetic and pharmodynamic information is used to determine how the drug interacts with the body. As I understand, the pharmokinetics looks at how the drug gets into and around the body, which involves dissolution of pills in the digestive system or movement within the body after injection. The pharmodynamics looks at how the drug interacts in the body with the target of the drug, such as binding to receptors of interest that affect the disease of interest. So the mode of drug delivery that is developed is determined to maximize the effective drug delivery to where it is needed in the body.