Police have arrested 24 people and seized 27 different types of drugs at a dance party in Sydney's Olympic Park.
Police say six people were charged with supplying a drug, including one man who was allegedly found with 110 pills in his possession.
A teenage girl was also charged after 51 pills were found on her.
Among the numerous drug types were 210 ecstasy pills, 40 capsules of speed and small quantities of amphetamines and cannabis.
The arrests followed a high visibility policing campaign at the western Sydney event, which was attended by 5,000 people.
The police operation included four drug detection dogs and uniformed police on foot and bike.
Flemington Commander, Inspector Brett Henderson, said a small number of juveniles would also be followed up in accordance with the Young Offenders Act.
"Operations of this sort that involve the NSW Police Force and community are important in ensuring that people can enjoy themselves in a safe, drug free environment," he said in a statement.
"It is also good to ensure that we have stopped such dangerous, addictive drugs from being distributed to juveniles as well as the general community and we are very pleased to have the cooperation of the general community.
"It's a very pleasing result."
