from http://www.donateblood.com.au/who-can-give/faq#faq_271


Drug use (recreational) - Can I still donate blood even if I have taken recreational drugs?


This will depend on what drug was taken and how and when it was taken. If you have ever used intravenous (IV) drugs not prescribed by a registered medical practitioner, even once, you will not be eligible to donate. The Blood Service values the privacy of donors. All interviews are conducted in private and donor confidentiality is always maintained.

Please call 13 14 95 for further information.