“Unclear” whether opioids are effective at treating cancer pain
Source: www.eurekalert.org Author: Peer-reviewed publication, University of Warwick The world’s largest review on opioid medicines for cancer pain has found it is unclear whether some commonly used opioid medicines are better than a placebo and suggests that non-opioid medicines, including aspirin, may be as effective as opioids. Researchers examining the data on opioids for pain caused by cancer have found surprisingly large gaps in evidence regarding the true benefits of these medicines for cancer pain. The study challenges the commonly held view that opioids are the most powerful pain relievers. The study, led by The University of Sydney and including The University of Warwick highlights that there is no ‘one size fits all’ treatment approach for cancer pain, urging health professionals and patients to carefully weigh up the evidence when deciding on a suitable pain management plan. Opioid pain relievers are the most common treatment for cancer pain management. Many international guidelines including the World Health Organization, recommend opioid medications to manage background cancer pain (constant pain) and breakthrough cancer pain (temporary flare-ups of pain in addition to background pain). However, the study found very few trials have compared commonly used opioid medicines with placebo. This included morphine, oxycodone and methadone. The study did not find convincing evidence that morphine was better or safer than other opioid medicines for background cancer pain outside of end-of-life care. This is despite morphine being widely viewed as the ‘gold standard treatment’ for cancer care by physicians and recommended in many international clinical guidelines [...]