It is unlikely to develop an addiction when cannabis is used as a medicine. The recommended dose for medicinal use is often lower than that for recreational use, and a medical professional should be involved in monitoring the patient.

Patients should take particular care, however, if they have been addicted in the past. High dosages of medicinal cannabis taken over a longer period may lead to addiction. Quitting may then cause withdrawal symptoms, such as mild forms of restlessness, irritability, insomnia and nausea.