Medical cannabis is a substance that has both supporters and opponents. Its effects on the human body have been known for many centuries and it undoubtedly has an impact on human functioning. Its therapeutic effects are subjected to clinical studies, which show that it has characteristics that indicate a positive effect in the treatment of many conditions. Nevertheless, it is a substance that has addictive properties and does not remain free of side effects. Hence the need for further research to confirm its efficacy and safety.