This Monograph (No. 02) provides a comprehensive list of drug policy interventions. The authors identify a total of 107 different drug policy interventions, whilst also noting that some interventions may still be missing, and that others may describe and document drug policy interventions with different terms. With such an undifferentiated and long list of drug policy interventions, the issue of the ways in which these interventions are then coded and classified is also addressed. Ten different taxonomies (classification schemes) are reviewed and conclusions drawn in relation to which taxonomies prove useful in describing the array of drug policy interventions.