NSW Health has issued a broad health warning to the community about the danger of using drugs thought to be cocaine, following a recent increase in opioid overdoses in the Sydney and Northern NSW regions.

Ten people across NSW were hospitalised in August with a suspected opioid overdose after using substances they thought to be cocaine, with three requiring treatment in an intensive care unit.

This is a marked increase on the number of people normally seen in this period.

Only two of the cases are thought to have been linked.

In cases where blood or urine was tested, results show that heroin was present with cocaine.

Medical Director of the NSW Poisons Information Centre, Dr Darren Roberts, said it is important people recognise the signs of an opioid overdose early and know how to respond.

“Opioids such as heroin can cause pin-point pupils, drowsiness, loss of consciousness, slowed breathing/snoring and skin turning blue/grey and can be life-threatening,” Dr Roberts said.

“One of the dangers of illicit drug supply is the contents and strength of the substance you are getting is uncertain and can be inconsistent. An opioid overdose could quickly result from a single line.

“Opioids such as heroin can be sold as or found in cocaine, methamphetamine, and MDMA (ecstasy).

"You cannot always tell the difference between these drugs by appearance.

“In light of this detection, people who use drugs such as cocaine, methamphetamine, MDMA or opioids should carry naloxone.”

If you witness someone experiencing any unexpected symptoms after using drugs, you should call Triple Zero (000) immediately or seek urgent medical attention. Naloxone should be given immediately if available.

Naloxone is an important life-saving medication that reverses the effects of opioids. It does not require a prescription and is free for anyone at risk of opioid overdose in NSW.

It is available as an easy to use nasal spray or injection from some pharmacies and other health services. You can find more information on the take-home naloxone program. 

NUAA can mail you naloxone in a discreet package. Order via their online shop or call (02) 9171 6650.

Please seek help if you need it

You won't get into trouble for seeking medical care. If you feel unwell, or if your friend feels unwell, do something about it.

Anyone who has concerns about adverse effects from drugs should contact the NSW Poisons Information Centre on 13 11 26, at any time 24/7.

For support and information on drug and alcohol problems, contact the Alcohol and Drug Information Service on 1800 250 015. This is a 24/7 service offering confidential and anonymous telephone counselling and information.

If in doubt please check NSW public drug warnings.