Eight festival goers have been charged with supplying drugs at a dance party in Sydney's west, while another 37 people were found with drugs on them.

Police using sniffer dogs charged a total of 45 people at the Defqon.1 dance party which started on Saturday morning at Sydney International Regatta Centre.

A heavy police presence greets revellers at the Defcon.1 dance festival. Credit:Brook Mitchell

A 22-year-old German national who allegedly had 396 capsules containing ecstasy and amphetamine has been charged with supplying a prohibited drug and breach of bail.

Another man was allegedly caught with 200 ecstasy pills, and a woman was also found with 87 pills, all believed to be MDMA.