Workers Compensation
Opioid overdose deaths are Australia's leading cause of unintentional drug death, concentrated in the same age band that dominates workers compensation claims. Here is what the 2025 data means for injury managers.
What the 2025 overdose report actually found
Penington Institute's Australia's Annual Overdose Report 2025 recorded 2,272 drug-induced deaths in Australia in 2023, of which 1,768 (78 percent) were unintentional. Opioids remained the drug type most often involved, present in 776 unintentional deaths, or 43.9 percent of the total, almost double the 413 opioid-involved deaths recorded in 2001.
Within that opioid total, heroin was involved in 347 deaths, natural and semi-synthetic opioids such as oxycodone, morphine and codeine in 218, synthetic opioids including fentanyl, pethidine and tramadol in 197, and methadone in 171. Pharmaceutical opioids as a group, which includes natural, semi-synthetic and synthetic opioids plus buprenorphine and hydromorphone, were involved in 366 deaths, or 47.2 percent of all opioid-involved deaths in 2023.
Why the age shift matters for workers compensation claims
The most striking change in the report is not the drug type, it is who is affected. In 2001, people aged 20 to 39 made up the largest share of unintentional overdose deaths, at 21.6 percent for the 20 to 29 group and 24.7 percent for the 30 to 39 group. By 2023, that pattern had reversed. The 40 to 49 group accounted for 27.4 percent of unintentional overdose deaths and the 50 to 59 group accounted for 24.3 percent, together making up more than half of all such deaths.
Since 2001, deaths among people aged 50 to 59 have increased by 305 percent, the largest increase of any age group, and deaths among those aged 60 to 69 have increased by 179 percent. Deaths among people aged 29 and under fell by 34 percent over the same period. This is precisely the demographic shift that matters to injury managers: the age band now carrying the highest overdose risk is the age band most commonly seen on chronic pain and long-tail workers compensation files.
Opioids and benzodiazepines: the combination behind the numbers
The report is clear that most opioid-involved deaths are not single-drug events. The most common combination is opioids together with benzodiazepines, a poly-drug pattern that has more than doubled since 2007, from 160 deaths that year to 414 in 2023. The combination of opioids with a broader range of other pharmaceuticals was the second most common pattern, involved in 378 deaths in 2023.
Looking at pharmaceutical opioids specifically, 70.3 percent of poly-substance deaths involving pharmaceutical opioids also involved benzodiazepines, and 45.4 percent also involved anti-depressants. For heroin, 60.9 percent of poly-substance deaths also involved benzodiazepines. This is the exact medication combination, an opioid, a benzodiazepine, and often an anti-depressant, that shows up on many workers compensation and CTP claims where pain, sleep and mental health conditions are being treated at the same time.
How this plays out differently by age and sex
Among unintentional deaths involving pharmaceutical opioids specifically, the 40 to 49 age group recorded the highest number over the five years to 2023 (619 deaths, 27.8 percent), followed by the 50 to 59 group (508 deaths, 22.8 percent). More than one third (37.6 percent) of pharmaceutical opioid deaths occurred in people aged 50 and above, compared with 13.9 percent in people under 30. The pattern for heroin was similar in age terms, with the 40 to 49 group again the largest cohort (704 deaths, 33.9 percent).
Sex differences are also relevant to how a claim might present. Among unintentional opioid deaths in women, pharmaceutical opioids (59.3 percent) were more common than heroin (32.4 percent). Among men, heroin (50.3 percent) was more commonly involved than pharmaceutical opioids (43.6 percent). On a workers compensation file, where the opioid in question is almost always a prescribed pharmaceutical opioid, this points to female claimants on long-term opioid therapy as a group worth particular attention.
What injury managers can do with this data
None of this means every claimant on an opioid is at risk. It means the medication list itself is the signal worth checking, particularly where three conditions line up: the claimant is aged 40 to 59, the claim has run long enough for pharmacological pain and mental health management to have accumulated, and the current script includes an opioid alongside a benzodiazepine or anti-depressant.
An independent pharmacist medication review is the most direct way to test for this pattern before it becomes a claim risk rather than after. The review sets out the full medication list against the injury and the return-to-work plan, flags interaction risk in writing, and gives the case manager and treating GP a shared, prescriber-neutral reference point for any deprescribing conversation.
Key Takeaways
- Opioids remain the leading cause of unintentional overdose death in Australia, involved in 776 deaths in 2023, or 43.9 percent of all unintentional drug-induced deaths.
- The age group carrying the highest share of unintentional overdose deaths has shifted from people in their twenties and thirties in 2001 to people aged 40 to 59 in 2023.
- Deaths among people aged 50 to 59 have risen 305 percent since 2001, the largest increase of any age group.
- Opioids combined with benzodiazepines is now the most common poly-drug pattern behind opioid deaths, more than doubling from 160 deaths in 2007 to 414 in 2023.
- Among poly-substance deaths involving pharmaceutical opioids, 70.3 percent also involved benzodiazepines and 45.4 percent also involved anti-depressants.
- An independent, written medication review is the most direct way to catch this combination on a claim before it becomes a risk.
Frequently Asked Questions
Why does the 2025 overdose report matter for workers compensation claims?
The report shows unintentional overdose deaths are now concentrated in people aged 40 to 59, the same age band that dominates workers compensation claimant lists. Opioids remain the single most common drug type involved, which puts long term pain claims directly in the risk picture the data describes.
What medication combination carries the highest overdose risk on a claim?
Opioids combined with benzodiazepines is the most common poly-drug pattern behind opioid deaths nationally, involved in 414 deaths in 2023, more than double the 160 deaths recorded in 2007. Anti-depressants are also frequently present alongside this combination.
Which age group is most affected according to the latest data?
People aged 40 to 49 and 50 to 59 now account for the largest shares of unintentional overdose deaths, a reversal from 2001 when people in their twenties and thirties were most affected. Deaths in the 50 to 59 age group have risen 305 percent since 2001.
What should an injury manager do if a claim shows this medication pattern?
Request an independent pharmacist medication review when opioids, benzodiazepines, and anti-depressants appear together on the same claim, particularly for claimants in the 40 to 59 age range. The review gives the case manager a written, prescriber-neutral record to act on.
Primary source: Penington Institute, Australia's Annual Overdose Report 2025.
