Incorporating the ratio and proportion, formula, and dimensional analysis methods, this online course presents a step-by-step approach to the calculation and administration of drug dosages. This Drug Calculations Online course is designed to be used with the 4th edition of Gray: Calculate with Confidence. Once students have read topics in the text, the online course provides them an opportunity for application and practice. Animations, voice-overs, and interactive self-assessment activities are used to provide an engaging and interactive course platform for students. This course includes practice problems to promote active learning and quizzes that instructors can use to evaluate students' understanding of content presented in the course. A comprehensive test bank of approximately 300 questions is also provided for instructor's to build quizzes and test.