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Systematic review finds ketamine offers no pain advantage over opioids in prehospital trauma care settingsKetamine works as well as opioids for trauma pain

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Key Takeaway
Ketamine offers no significant pain advantage over opioids in prehospital trauma care, with similar safety profiles and modest heart rate increases.

A comprehensive systematic review and meta-analysis evaluated eighteen studies involving adult patients with traumatic injuries treated in the prehospital setting. The research compared ketamine against opioid monotherapy and ketamine-opioid combinations to assess efficacy and safety profiles.

Results indicated that ketamine was not associated with a significant difference in pain reduction compared with standard opioid treatments. The weighted mean difference for pain scores was essentially zero, suggesting comparable analgesic effects between the two approaches.

Hemodynamic parameters showed modest increases in heart rate with ketamine administration, averaging 3.19 beats per minute. However, systolic blood pressure and respiratory rates remained statistically unchanged relative to comparator groups.

Safety outcomes revealed that adverse events were infrequent and primarily mild, with emergence reactions being the most common occurrence. Serious adverse events were reported at low rates, supporting the tolerability of ketamine in this acute care environment.

The certainty of evidence was evaluated using GRADE standards, providing a structured assessment of the findings. These results inform clinical decisions regarding analgesic selection for prehospital trauma management.

A new analysis of 18 studies looked at how well ketamine works for pain in adults with traumatic injuries treated before reaching the hospital. Researchers compared ketamine to opioids and to combinations of both drugs. They found that ketamine reduced pain just as much as opioids did. There was no significant difference in pain scores between the two treatments.

The analysis also checked for side effects. People who got ketamine had a small increase in heart rate, about 3 more beats per minute on average. But there were no differences in blood pressure or breathing rate compared to opioids. Side effects were uncommon and mostly mild, with emergence reactions being the most common.

It is important to note that this was a review of existing studies, not a new experiment. The certainty of the evidence was evaluated using GRADE, which helps rate how reliable the findings are. The results suggest that ketamine is a reasonable option for pain relief in the field, especially when opioids may not be ideal.

For patients, this means that ketamine can be an effective painkiller for serious injuries. However, the modest increase in heart rate should be considered, especially in people with heart conditions. Always follow your healthcare provider's advice about pain management.

What this means for you:
Ketamine is as effective as opioids for trauma pain, with mild side effects.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedJun 2026
View Original Abstract ↓
BACKGROUND: Effective prehospital analgesia is vital in trauma care. Although opioids are first line, they carry risks of adverse events. Ketamine has emerged as a promising alternative, offering potent analgesia, dissociation, and a favorable hemodynamic profile suited to resource-limited, time-sensitive prehospital care. OBJECTIVE: The objective of this systematic review and meta-analysis was to evaluate the analgesic effectiveness and physiologic effects of ketamine compared with opioid-based analgesia in adult patients with traumatic injuries treated in the prehospital setting. METHODS: CINHAL Plus (EBSCO), OVID, and Cochrane Central were searched (2013-2024) using MESH terms such as ``ketamine,'' ``prehospital,'' and ``trauma.'' Included studies involved adults with traumatic injuries treated by prehospital clinicians with ketamine. Comparators included opioid monotherapy and ketamine-opioid combinations. Primary outcomes were pain scores, hemodynamic parameters, and adverse events. Risk of bias was assessed using established tools for randomized and nonrandomized studies, and certainty of evidence was evaluated using GRADE (Grading of Recommendations, Assessment, Development, and Evaluations). Meta-analyses were conducted using a quality-effects model incorporating study-level risk of bias. RESULTS: Eighteen studies met inclusion criteria; three were suitable for meta-analysis comparison of ketamine and opioid monotherapy. Ketamine was not associated with a significant difference in pain reduction compared with opioids (weighted mean difference [WMD] 0.00; 95% confidence interval [CI] -0.77-0.78). Heart rate increased modestly with ketamine (WMD 3.19 beats/min, 95% CI 1.48-4.90), whereas systolic blood pressure showed no difference as compared with opioids (WMD 1.53 mm Hg, 95% CI -2.68-5.75). No difference in respiratory rate was observed (WMD -0.07 breaths/min, 95% CI -0.84-0.70). Adverse events were infrequent and were primarily mild, with emergence reactions most common. CONCLUSIONS: Ketamine provides analgesia consistent with similar effectiveness to opioids in prehospital trauma care, with comparable physiological effects and low reported rates of serious adverse events.
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