Coercion is still frequently used in psychiatry and tends to be considered a necessity, when a patient at risk has lost his/her ability to judge. The aim of this article is to report and discuss current scientific knowledge on this topic. The different steps associated with coercion contribute, along with the illness, to the degree of stress experienced by the patient and might compromise his/her level of adherence to the treatment offered. Clinicians need to consider three dimensions: the coercion applied, the legal status and the subjective feeling of coercion. Pressure that is symbolically negative, positive or legal is exerted on the patients, thereby raising questions about the development of alternatives to the use of coerced treatment. The introduction of the advance directives to Swiss cantonal laws could give rise to different forms of collaboration that are more acceptable to patients.