This report presents the results of the WA EDRS (formerly the PDI), an ongoing study monitoring ecstasy and related drug markets within WA. It is part of a nationwide study, which
commenced in New South Wales, Queensland and Victoria in 2000, with the addition of other states and territories in 2003. The survey design was informed by and modelled upon the preexisting
IDRS, designed to monitor use of the main illicit drugs in Australia, developing a new survey for monitoring trends in the ecstasy and related drugs (ERD) markets.