Every drug you give sets off a chain reaction, and in this episode of Clinical Adventurer, we break down the science of how it all works. We’ll explore key pharmacodynamic concepts like potency, maximal efficacy, and therapeutic index so you can better understand safety margins and dosing decisions. You’ll also learn how drugs act as agonists or antagonists, what influences onset, peak, and duration, and how factors like genetics, tolerance, and interactions shape patient responses. This is the practical pharmacology insight that helps you think critically and act safely at the bedside.