This document defines and discusses different types of drug use including misuse, abuse, and addiction. It outlines seven categories of drugs including central nervous system depressants, stimulants, hallucinogens, dissociative anesthetics, narcotic analgesics, inhalants, and cannabis. The key differences between drug misuse and abuse are identified as intent, with misuse referring to taking drugs as prescribed and abuse referring to taking drugs to elicit feelings. Treatment for misuse may involve reprimand while treatment for addiction requires a medically supervised detoxification and rehabilitation program tailored by a mental health professional.