Briefly describe the phases involved in each step of developing and approving a new drug in the United States.

Briefly describe the phases involved in each step of developing and approving a new drug in the United States.

Briefly describe the phases involved in each step of developing and approving a new drug in the United States.
1. The process of dynamic equilibrium determines drug concentration in the body. Describe how the phases of absorption, distribution, metabolism, and excretion impact drug concentrations.