Opioids for Acute Pain: Major Review Finds Limited Benefits & Risks
The world’s largest review of opioid pain relievers prescribed for acute pain has found these medications offer only limited, short-term relief for some conditions and are ineffective for others. The findings, published today in the journal Drugs, challenge the long-held belief that opioids are the most effective initial treatment for many types of acute pain.
Researchers from the University of Sydney led the comprehensive review, analyzing 59 systematic reviews encompassing over 50 acute pain conditions in both children and adults. The study meticulously mapped the efficacy of common opioid pain relievers – including codeine, morphine, oxycodone, and tramadol – compared to placebo.
“Opioids are among the most commonly prescribed treatments for acute pain,” explained lead author Christina Abdel Shaheed, Associate Professor at the University of Sydney’s School of Public Health. “However, our review found that they did not provide large or lasting pain relief compared with placebo for the vast majority of acute pain conditions, with pain relief typically lasting only a few hours.”
The review revealed that oral opioids were only slightly better than placebo for acute musculoskeletal pain in the six to 48 hours following treatment initiation. Importantly, the use of opioids in these cases was also associated with an increased risk of side effects, such as nausea and vomiting.
Limited Benefit Across a Range of Conditions
The researchers found that opioids provided only small, time-limited pain relief for specific conditions including stomach pain, dental surgery, ear procedures, traumatic limb pain, pain following childbirth, cesarean pain, and bunion removal. However, for some conditions, opioids offered no benefit over placebo. These included certain limb surgeries, kidney stone pain, pain after tonsil removal, and pain in newborns requiring assisted breathing.
the review indicated that opioids were not consistently beneficial over time for heart-related pain, pain following hysterectomy, or when delivered topically via patches for dermatological pain. The study also highlighted that the benefits were often short-lived, and regular use carries inherent risks.
“the evidence does not support regular opioid use for acute pain,” the authors stated. They also noted that many studies evaluated single doses, which may not accurately reflect real-world prescribing practices.
Side Effects and the Risk of Dependence
The review underscored the potential for side effects associated with opioid use, particularly for acute musculoskeletal pain, traumatic limb pain, and pain following certain surgeries. Beyond immediate side effects, the researchers emphasized the risk of developing persistent opioid use – sometimes within days of initial prescription – even when initially prescribed for acute pain.
“It is important that patients are informed about the potential harms from opioids when prescribed them, and that doctors prescribe these medicines judiciously – lowest effective dose for the smallest amount of time – for acute pain,” said co-first author Dr. Stephanie Mathieson from the University of Sydney’s Institute for Musculoskeletal Health and School of Pharmacy.
The researchers also pointed to inadequate reporting of side effects in clinical trials, suggesting that the true risks of opioid use may be underestimated. This highlights the need for improved reporting of harms and the development of safer, more effective alternatives for acute pain management.
Implications for Patients and Healthcare Providers
Associate Professor Joshua Zadro, also a co-first author from the University of Sydney, emphasized the broad implications of these findings. “These findings are important for patients across all age groups who experience acute pain, doctors treating these conditions, and policymakers who regulate the safe use of these medicines in the community.”
The study’s findings align with reporting from News-Medical.net, which noted that the review provides the strongest and most comprehensive evidence to date regarding the effectiveness of opioids for acute pain. A separate report from Medical Xpress also highlighted the study’s conclusion that opioids are often ineffective for many acute pain conditions.
The findings come as health officials continue to grapple with the ongoing opioid crisis. While this review focuses specifically on acute pain, the potential for escalation to chronic use and the associated risks of dependence, overdose, hospitalization, and death remain significant concerns. The researchers advocate for a more cautious and informed approach to opioid prescribing, emphasizing the importance of exploring alternative pain management strategies.
The study’s authors call for further research to identify and develop safer, more effective alternatives for managing acute pain, reducing reliance on opioids and mitigating the associated risks.