This chapter summarizes the arguments in favor of, and counters the arguments against, awarding psychologists prescriptive authority. Regardless of whether one supports psychologists' efforts to become prescribers, is uncertain or neutral on the topic, or opposes those efforts, it is important to understand the reasons why many psychologists have become strong advocates for the cause. It is our hope that this chapter will help supporters crystallize their thinking on the topic, those with mixed feelings to see the value of the prescriptive authority movement, and opponents to reconsider their position.This chapter begins with a summary of the arguments for prescriptive authority for psychologists, followed by a response to the arguments against. In brief, the former set of arguments reduces to the issue of access, whereas the latter arguments have to do with safety. If the case can be made that prescriptive authority for psychologists improves access to appropriate care without compromising safety, then from a logical perspective the correct position on this controversy is the following: Psychologists should be allowed to prescribe.