In this course, learners will gain an understanding of Substance Use Disorder and Opioid Use Disorder. This includes learning what opioids are, how they are used medically, what alternatives are available for opioids. At the end of the course learners will be able to demonstrate the difference between addiction (use disorder), tolerance, and dependence; recount the three waves of the opioid crisis and their origins; recognize how opioid receptors function; and care for someone who has overdosed.