Review of 17,115 trauma patients finds prehospital pain drugs largely safe, evidence thin
Apart from one opioid study, none of the seventeen included studies reported a serious adverse event attributed to the drug, though minor effects such as nausea were common.
Key takeaways
- A systematic review listed on PubMed on October 28, 2026 covered seventeen studies with 17,115 injured adult patients given pain medication before hospital arrival.
- The drugs studied were opioids, ketamine, methoxyflurane and paracetamol, and the authors report that each one showed some degree of effectiveness.
- Only one study, of opioid therapy, reported a serious adverse event the drug was blamed for; nausea, dizziness, dysphoria, agitation and drowsiness were common minor effects.
- The authors say the evidence base is limited by its scope, by its methods and by differences between treatment protocols.
- For crews: the review covered only adults older than 15 receiving systemic drugs, so it excluded children, topical routes and non-drug pain measures.
A systematic review published in Emergency Medicine Australasia and listed on PubMed on October 28, 2026 concludes that pain medication given to injured adults before they reach hospital has a generally favourable safety and effectiveness record. The authors also say the research behind that finding is limited [1].
The review, titled "Prehospital Analgesia in Trauma: A Systematic Review of Current Evidence," was written by L. Alkoby-Meshulam, C. Shahar, R. Jacob, D. Ben-Eli, R. Berant and D. Trotzky. It pulled together seventeen studies covering 17,115 patients [1].
The review covered opioids, ketamine, methoxyflurane and paracetamol. Apart from a single study of opioid therapy, the authors report that "no drug-attributed serious adverse events were reported" [1].
What the records show
The abstract states that the team aimed to judge how strong the evidence is on whether prehospital drug-based pain relief is safe and works in acutely injured adult trauma patients [1].
Researchers searched five databases: PubMed, Google Scholar, Cochrane Library, Embase and Scopus. The search window ran from January 1st, 2014, to January 1st, 2026. Eligible studies had to report on safety, effectiveness or both in injured adults, defined as patients older than 15 [1].
Several kinds of work were excluded, according to the abstract:
- studies that were not original research
- paediatric studies
- studies of non-pharmacologic pain relief
- studies of non-systemic routes, with topical use given as an example
The seventeen included studies used a mix of designs [1]:
- 6 randomized controlled trials
- 5 retrospective cohort studies
- one retrospective comparative study
- one retrospective observational study
- two prospective observational studies
- one prospective cohort study
- one non-randomized clinical trial
On safety, the authors found that minor side effects were common. The abstract lists nausea, dizziness, dysphoria, agitation and drowsiness. Serious adverse events blamed on a drug appeared in only one study, which involved opioid therapy [1].
On effectiveness, the abstract says all of the agents showed some benefit, though to varying degrees [1]. It does not rank the drugs against each other.
The authors conclude that current evidence shows an "overall favourable safety and effectiveness profile" for prehospital analgesia in adult trauma patients [1].
Why it matters for EMS
The abstract frames pain control as a core part of prehospital trauma care. It also states that pain in this setting is often undertreated, despite physiologic and psychologic consequences for the patient [1].
One barrier the authors name is uncertainty about whether drugs given en route are safe and effective [1]. The four drug groups in the review are agents that ground and air crews may carry under their local protocols and medical direction. The review gathers safety and effectiveness reports on all four in one place.
The minor effects listed in the abstract, including agitation, dysphoria and drowsiness, are ones crews can see during transport. The single serious adverse event signal tied to a drug came from an opioid study [1].
What the records do not tell us
The abstract leaves several questions open:
- It does not describe the serious adverse event or events in the opioid study, nor which opioid was involved.
- It does not give rates for the minor side effects, only that they were common.
- It does not give doses, routes of administration or pain score changes for any drug.
- It does not say how many of the 17,115 patients received each agent, or which countries or EMS systems the studies came from.
- It does not compare agents head to head or say which, if any, performed best.
- It does not apply to children, who were excluded, or to topical and non-drug pain relief.
The authors themselves flag limits. Given how widespread injury-related pain is in the prehospital setting, they wrote, "evidence is limited by scope, methodology and variations of treatment protocols" [1]. Most of the included studies were not randomized trials.
The PubMed record lists the paper as a journal article and systematic review. The abstract does not mention funding or conflicts of interest, and the full text was not part of the records reviewed for this story.
What to watch
The records do not name a follow-up study, guideline update or scheduled decision connected to this review.
Questions readers ask
Is prehospital pain medication safe for trauma patients?
A 2026 systematic review of seventeen studies with 17,115 injured adults found an overall favourable safety and effectiveness profile. Only one study, of opioid therapy, reported a serious adverse event attributed to the drug.
Which pain drugs were studied in the prehospital trauma analgesia review?
The review included studies of opioids, ketamine, methoxyflurane and paracetamol. The abstract says all of them showed effectiveness to varying levels.
What side effects were common with prehospital analgesia in trauma?
The abstract lists nausea, dizziness, dysphoria, agitation and drowsiness as common minor adverse effects. It does not give rates for them.
Did the prehospital analgesia review include children?
No. The review was limited to adults older than 15 and excluded paediatric studies, topical or other non-systemic routes, and non-drug pain relief.
Sources
- Alkoby-Meshulam L, et al. Prehospital Analgesia in Trauma: A Systematic Review of Current Evidence. Emergency Medicine Australasia (PubMed) — Emergency medicine Australasia : EMA (2026-10-28). pubmed.ncbi.nlm.nih.gov/42947661/
This is news, not medical advice. EMS clinicians: follow your local protocols and medical direction.
