This book contains lecture notes intended for teaching biochemical pharmacology. The content is based on and best understood as an ancillary with the authors' textbook Biochemical Pharmacology (Wiley, 2012). Most of the figures have been adapted, with enhancements and occasional corrections, whereas the text is new and more condensed -- making it easier to cover most or all of the content in a single term. The focus is on principles, not on comprehensive coverage or clinical relevance. It uses a simple layout, presenting lecture slides in sequence, augmented with the explanatory text below each. This is an ideal format for ebook reading, yielding easier on-screen reading than a traditional book layout.