Bulletin 1 and 2 sampled a representative number of people aged between 15 and 64 years, according to standards set by the European monitoring centre for drugs and drug addiction (EMCDDA). Bulletin 3 provides a comprehensive review of many different aspects of cannabis use. Bulletin 4 provides a comprehensive review of many different aspects of cocaine use. Bulletin 5 presents key findings on polydrug use (the use of more than one substance within a specific time period). Bulletin 6 presents results regarding the use of sedatives or tranquillisers and anti-depressants on a representative sample of adults aged 15-64 years.