Refers to a variety of substances that are either illegal to possess, or legally available, but used inappropriately. In the 2001 National Drug Strategy Household Survey, the term 'illicit drugs'included marijuana/cannabis, pain-killers/analgesics, tranquillisers/sleeping pills, steroids, barbiturates, inhalents, heroin, methadone, other opiates, amphetamines, cocaine, hallucinogens, ecstasy/designer drugs, and injected drugs