Question: Which of the following statements about pharmacodynamic phase is correct? Pharmacodynamic phase is related to the drug-receptor interaction and its biological effect. Pharmacodynamic phase studies the amount of drug that is excreted into breast milk. Pharmacodynamic phase is concerned with the amount of drug that is metabolized by the liver. Optimization of the pharmacodynamic phase improves drug bioavailability. Pharmacodynamic phase is concerned with drug absorption.