WHACK Magazine is produced by VIVAIDS, the Victorian Drug User Organisation, a non-judgemental organisation that actively seeks to address the health, social and legal issues that affect drug users in Victoria.

WHACK is a publication which seeks to play a role in harm reduction by providing drug users with a free magazine that is written, designed, and distributed for them and provides (amongst other things) accurate information and discussion on issues that directly relate to their lives.

The primary role of WHACK is the provision of detailed and useful harm reduction information. Due to the diversed and marginalised nature of the drug user community, this information is written and presented in such a way as to be widely understood, have lasting impact, and is written from a peer perspective. This information takes a vast array of forms, from informative articles and interviews to comics, and covers most of the relevant topics in the commuinty.