Larissa is currently working as a postdoctoral research fellow at the Department of Psychiatry at the University of California, San Francisco (UCSF). Prior to this, she was appointed as a consultant in Drug Use Epidemiology at the United Nations Office on Drugs and Crime (UNODC). Furthermore, she has conducted significant addiction research studies at the Swiss Research Institute for Public Health and Addiction (ISGF) at the University of Zurich. In March 2015, she completed her Ph.D. at the University of Zurich, where she specialized in Clinical and Health Psychology. Larissa is part of the Core Research Team of Global Drug Survey (GDS) aiming to make drug use safer, regardless of the legal status of the drug. Her expertise includes motives and patterns of substance use (e.g., for recreation, self-medication, or cognitive enhancement), mental health, prevention and harm reduction in nightlife settings, drug checking, and digital health interventions to address substance use.