The chapter focuses on a large, heterogeneous group of actors: the patients of the Münsterlingen Psychiatric Clinic. It shows the wide range of people who were treated there over time, examines who received test substances, and discusses different patterns of administration as well as the reasons for the broad spectrum of test patients. The patients perceived and assessed the administration of test preparations very differently. Most of them were included in trials without receiving information or giving their consent, even though guidelines already existed that would have required it.