Drug injection can lead to a dependency by both physical and psychological means — and develops more quickly than with other methods of taking drugs. In recreational-use drug culture, preparation may include mixing the powdered drug with water to create an aqueous solution, and then the solution is injected. This act is often colloquially referred to as "slamming", "shooting [up]", “smashing”, "banging", "pinning", or "jacking-up", often depending on the specific drug subculture in which the term is used (i.e. heroin, cocaine, or methamphetamine). There are a variety of reasons why drugs would be more attractive to inject rather than take through other
Drug Recognition Expert categories of classifications a DRE is looking for, including; central nervous system depressants (benzodiazepines), CNS stimulants (methamphetamine), dissociative anesthetics (PCP), cannabis, hallucinogens (mushrooms), inhalants (glue), and narcotic analgesics (opiates). DREs often testify in court, where the term "expert" has important legal implications. Some jurisdictions do not allow the term Drug Recognition "Expert." In these jurisdictions DREs are called Drug Recognition Evaluators, or Drug Recognition Technicians. The acronym 'DRE' has been used to refer not just to the DRE officers, but also to the examination they perform, the "Drug Recognition Examination", or "Drug Recognition Evaluation." The confluence of acronyms leads to