Alexandra Karden is responsible for research and evaluation at the addiction prevention and drug checking organsation checkit!, at Suchthilfe Wien in Vienna, Austria. With a background in psychology, she works at the intersection of psychology, psychopharmacology and public health focusing on substance use patterns and motives of people who use drugs (PWUD) and monitoring the local drug market. Additionally, she is currently pursuing a PhD in Public Health at the Medical University of Vienna, investigating the impact of drug checking services on drug use behaviours and safer use practices as well as overall drug checking service accessibility and utilization.