NSW - Public Drug Warning: Four heroin overdoses following use of cocaine

Published on March 6, 2025

​Two people have died and another two admitted to hospital with heroin overdose after using what they believed to be cocaine in Sydney.

Know the risks

  • Heroin and other opioids may be sold as or found in cocaine, methamphetamine and MDMA.
  • Small amounts of opioids can cause life-threatening overdose in people who have never or rarely used opioids.
  • You cannot always tell the difference between heroin, cocaine and methamphetamine by appearance.
  • The risks of overdose are increased if you:
    • use a high dose, or re-dose when you are not getting the desired effect.
    • use with other drugs (for example alcohol, benzodiazepines, ketamine, GHB or opioids).
    • use drugs alone.
    • use a new batch.
  • Fentanyl test strips do not detect heroin or many other opioids.

Effects to look out for

Unexpected drowsiness, pinpoint pupils, loss of consciousness, slow breathing/snoring, and skin turning blue/grey after using a stimulant (for example cocaine, methamphetamine, or MDMA).

Getting help

If you or your friends see the warning signs of overdose:

  • Seek help immediately from your nearest emergency department or call Triple Zero (000).
  • You won’t get into trouble for seeking medical care.
  • Start CPR if someone is not breathing.
  • Use naloxone if you have it. Call ‘000’ even if naloxone has been given.

Take Home Naloxone program

  • Naloxone is a life-saving medicine that can temporarily reverse an opioid overdose.  Naloxone is available in a very easy to use nasal spray, and as a pre-filled injection.
  • You should carry naloxone if:
    • you are using drugs such as cocaine, methamphetamine, MDMA or opioids.
    • you are hosting or going to a party where drugs will be present.
  • If you are at risk of experiencing or witnessing an opioid overdose you can get naloxone for free without a prescription in NSW from some community pharmacies, needle and syringe programs, opioid treatment services and NUAA.
  • Visit Your Room - Naloxone for participating sites and more information on take-home naloxone.
  • NUAA can mail you naloxone in a discreet package. Order via their online shop or call (02) 9171 6650.

Support and advice

For free and confidential advice:

Current as at: Friday 13 September 2024

Source: https://www.health.nsw.gov.au/aod/public-drug-alerts/Pages/heroin-overdose-after-cocaine.aspx

Emergency: If you are experiencing an emergency, please call an ambulance on 000, or if you need to speak to someone urgently please call the National Alcohol and Other Drug Hotline on 1800 250 015.