This episode explores the simultaneous evaluation of pharmacokinetics (PK) and pharmacodynamics (PD) in early human trials, also known as Phase 1 studies. We discuss how these two concepts work together to help researchers understand a new drug's behavior in the human body, including its absorption, distribution, metabolism, and excretion (ADME), as well as its effects on cells, tissues, and organs. The discussion uses illustrative examples, such as the development of blood pressure medications and anti-cancer drugs, to explain how PK and PD data are correlated to determine safe and effective dosage ranges. The importance of bioanalytical measures, including sophisticated techniques like liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS), is highlighted.

The episode also delves into the regulatory landscape surrounding P ...