In this paper we consider the social usefulness of Cannabis, its therapeutic effects and negative aspects of its recreational applications as well as applications in medicine. Social usefulness is considered through its application for different purposes, such as industry, medicine and nutrition, while the therapeutic effects and negative aspects of consumption through the work emerge as very different concepts. The negative effects of its applications leading to the occurrence of prevention programs, with the aim of informing the public, particularly children and young people who are most at risk, about the possible adverse effects, and treatment for all those individuals who have developed an addiction and who need help reverting back to normal social streams. Through the work we briefly explored the recreational use of cannabis in the Republic of Croatia and the modification of criminal legislation that led to its decriminalization. Finally, the meaning of the term of the legislation is considered and the views for and against substantiated with research results.