More than 150 people were charged with drug offences at Sydney's Field Day music ​festival yesterday. 

Police confirmed in a report that six people were arrested for allegedly supplying prohibited drugs, while 167 people were arrested and charged with possession of prohibited drugs during an operation of the NYD event at The Domain.

A 22-year-old man, allegedly found with 138 MDMA pills, was also arrested and charged with supplying prohibited drugs, dealing in proceeds of crime and resisting arrest; he was granted conditional bail and will appear at the Downing Centre Local Court next month. 

The charges come a year after 205 people were arrested on drug charges at Field Day 2017.

Meanwhile, six people were taken to St Vincent’s Hospital for medical treatment (five of these people were conveyed for drug-related health issues) and one man requires surgery on his leg after he attempted to enter the festival unlawfully.

Field Day was already dealt a blow yesterday with the last minute cancellation of US artist Princess Nokia's set, who was replaced by UK comic and rapper Big Shaq, as well as Melbourne artist, Running Touch.

Names such as Flume, DJ Snake, Thundamentals and Wafia performed at yesterday's event.

NOTE: ​​This article has been amended — it previously and wrongly stated over 200 people were charged with drug offences at Field Day.