The language used has an impact on clinician attitudes and behaviors. In particular, the use of stigmatizing language or language reducing individuals in treatment to a given behavior has a negative impact on clinician attitudes, perception of people, perception of the disorders and treatment options. In addiction medicine, using clear, non-stigmatizing and scientifically appropriate language aims at delivering better care, increases treatment access, improves communication between health care professionals and improves knowledge transfer towards health care system users and their families, health care providers and society. The use of clear, slang-free, people-first language is crucial.