Illicit drug use in Australia is the recreational use of prohibited drugs in Australia. Illicit drugs include illegal drugs (such as cannabis, opiates, and certain types of stimulants), pharmaceutical drugs (such as pain-killers and tranquillisers) when used for non-medical purposes, and other substances used inappropriately (such as inhalants). According to government and community organisations, the use and abuse, and the illegality, of illicit drugs is a social, health and legal issue that creates an annual illegal market estimated to be worth A$6.7 billion.