Obtain a work visa. If you require a visa to work in Australia, submitting an application to the relevant embassy is your first priority.
Plavix (Clopidogrel): Plavix works by preventing coagulation of the platelets in the blood. It is especially suited for people who have certain medical conditions and heart conditions. It is also used as a preventative tool against the formation of clots in persons who have had a heart attack or stroke.
As for Pain Relievers, anything containing Acetaminophen/Paracetamol (Tylenol), Ibuprofen (Advil), or Naproxen Sodium (Aleve) may be of some help. If you're looking for an OTC Blood Thinner, Aspirin is your best bet, however Ibuprofen may also be of some help.