The HSE says significant levels of the substance have been detected in syringes.
Injecting cocaine has re-emerged as a trend in Ireland with significant levels detected in syringes collected in Dublin and the midlands.
The HSE's pilot project found heroin is the most commonly used substance among those who inject themselves with drugs.
Dr Garrett McGovern from Priority Medical Clinic in Dublin says the mix of drugs found in some syringes is concerning:
Carlow Man Dies In Workplace Accident
Details Announced For Next Public Sector Pay Strike
Offaly TD Slams Lack Of Answers From HSE On Midlands Hospice
Two People Taken To Hospital Following Midlands Crash
Acting Media Minister Promises Enforcement Of Reforms At State Broadcaster
Trade Union Movement "Too Quiet For Far Too Long" - Forsa Rep
Man Dies In Workplace Accident
Fleadh Cheoil Needs More Recognition - Westmeath Councillor