Free online courseIntroduction to Pharmacology

Course Description

Understanding how medicines work is essential for anyone studying or working in health. This free online course gives you a clear, beginner-friendly introduction to pharmacology by focusing on the two pillars that explain most drug behavior in the real world: pharmacokinetics and pharmacodynamics. You will learn how the body affects a drug and how a drug affects the body—then connect those ideas to everyday clinical decisions and safer medication use.

Rather than memorizing isolated facts, you will build a framework for thinking through medication outcomes. You will explore why absorption can differ between environments like the stomach and the intestines, how drugs move across cell membranes, and what properties can improve solubility and uptake. These fundamentals help you predict why two patients taking the same dose may experience different effects, and why formulation and physiology matter.

The course also introduces the logic behind drug interactions, emphasizing how pharmacodynamic interactions can change the intensity or direction of a medication’s effect. That knowledge supports more confident, safety-minded reasoning when multiple drugs are used together. You will also examine the purpose of Phase 1 metabolism and how metabolic changes can alter drug activity, duration, and the potential for adverse effects.

To help you apply what you learn, the course includes practice questions designed to reinforce key concepts and sharpen your exam-style reasoning. By the end, you will be better prepared to interpret medication responses, anticipate factors that influence absorption and metabolism, and communicate core pharmacology concepts with greater clarity. Whether you are starting a health program or refreshing essentials for professional growth, this course provides a practical foundation you can build on.