This policy briefing considers the development of evidence-based drug demand reduction interventions. Following a definition of key terms used in the evidence-based drug demand reduction arena, the briefing then presents the main challenges involved in transferring scientific knowledge into practical applications, with a particular emphasis on 'best practice'.

Table of contents:
• Key issues at a glance
• Definitions
• Understanding best practice
• Guidelines and standards: popular instruments to promote best practice
• Accessing and using scientific evidence
• Learning from each other — minimum quality standards for Europe
• Implementing evidence through guidelines, standards and other tools
• Next steps: identifying gaps and considering new issues
• Conclusions and policy considerations
• Key sources
• Web information