Department for Education & Skills.
Drugs - Guidance for schools [2004]

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"1.3 Terminology
The definition of a drug given by the United Nations Office on Drugs and Crime is: A substance people take to change the way they feel, think or behave. The term ‘drugs’ and ‘drug education’, unless otherwise stated, is used throughout this document to refer to all drugs:
- all illegal drugs (those controlled by the Misuse of Drugs Act 1971)
- all legal drugs, including alcohol, tobacco".