e-Health involves the use of digital technologies to improve health in a variety of ways including:

• providing drug-related information with harm reduction advice (e.g. safer use) with or without personalised feedback from professionals and linked with specialised drug services if needed;
• treating patients with substance use disorders, including comorbidity, via e-health interventions; educating treatment professionals using e-learning modules on therapeutic techniques; and
• using digital diaries to monitor substance use in persons being treated for substance use disorders.