Police on Tuesday arrested 194 people at Field Day in The Domain suspected of supplying or possessing drugs.
Among those charged were two men, 19 and 21, and an 18-year-old woman allegedly found with 120 MDMA capsules.
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뮤직 축제 마약복용 참사 이번에는 VIC주..20살 청년 사망
On Wednesday they said five people were taken to hospital from the annual music festival, four for drug-related issues, but the substances were yet to be determined.
Detective Chief Inspector Stuart Bell said a variety of drugs were seized including ecstasy or MDMA, ketamine, cannabis.
"Ultimately young persons have to be mindful that taking drugs are not safe and illegal substances can be harmful to your health. From our perspective, we just want to encourage people not to take drugs," he said.
State governments are resisting calls to introduce pill testing at festivals.
AAP
A 20-year-old Victorian man died in hospital on Tuesday after a suspected overdose at the weekend's Beyond The Valley festival and a 22-year-old Queenslander died after overdosing at the Lost Paradise Festival north of Sydney.
Another man in his 20s cheated death after overdosing at the Victorian event.
Five revellers have died at Australian music festivals in about five months.
In Sydney, six people were charged with supplying MDMA, ketamine and other substances at a New Year's Day music festival.