Drugs are related to crime in multiple ways. Most directly, it is a crime to use, possess, manufacture, or distribute drugs classified as having a potential for abuse. Cocaine, heroin, marijuana, and amphetamines are examples of drugs classified to have abuse potential. Drugs are also related to crime through the effects they have on the user’s behaviour and by generating violence and other illegal activity in connection with drug trafficking. The following scheme summaries the various ways that drugs and crime are related.