Through a literature study of previous research, the study aims to investigate injection rooms in Europe. The study also aims to compile and discuss effects, both positive and negative, of injection rooms linked to the prevention of drug-related mortality. This is especially considered on the basis of possible obstacles related to the implementation of injection rooms in Sweden. The results show that injection rooms are seen as a harm reduction strategy, which can be motivated from both a user perspective and a public health perspective. Potentially, injection rooms have been shown to have positive effects on fatal overdoses and the spread of infection. What has been established is that injection rooms can work to reach an otherwise marginalized group. No negative effects have been demonstrated. Possible obstacles seen in the implementation of injection rooms in Sweden are the current drug policy which advocates vision zero. In order to fulfill the best function, it has been shown that the availability of injection rooms needs to be unlimited, which can be difficult to justify financially regarding the size of the target group.