What should dentists prescribe?

In recent months in Australia the, country's Association has been negotiating with the Federal Government over the rights of dentists to prescribe. The question is not the legal right to order a drug for a patient, but the entitlement of patients to a Government health scheme benefit for the dentist's prescription. The debate has, however, opened up broader questions. What is a reasonable extent of entitlement? What should a dentist be allowed to prescribe?