When four people were found dead last week in one home in outer Melbourne, there was one common link. The same synthetic opioid was detected in all four bodies. Since then, government authorities, and various experts have sounded the alarm. A new synthetic drug is on our streets. It’s contaminating other recreational drugs. And it’s hundreds of times stronger than heroin. Today, general practitioner and addictive medicine specialist, Dr Paul MacCartney, on the growing risk of an opioid crisis in Australia.