Pharmacodynamics: This tutorial outlines the basic

This tutorial outlines the basic principles of the concentration-effect relationship (pharmacodynamics) and illustrates the application of pharmacokinetics and pharmacodynamics to predict the time course of immediate drug effects. Pharmacodynamics (sometimes described as what a drug does to the body) is the study of the biochemical, physiologic, and molecular effects of drugs on the body and involves receptor binding (including receptor sensitivity), postreceptor effects, and chemical interactions. Pharmacodynamics studies a drug's molecular, biochemical, and physiologic effects or actions. It comes from the Greek words "pharmakon," meaning "drug," and "dynamikos," meaning "power." Learn about the principles, types and mechanisms of drug action on various biomolecular targets, such as enzymes, ion channels, transporters and receptors. Explore the concepts of stimulation, depression, irritation, replacement and cytotoxic action of drugs.