Adverse events associated with single dose oral analgesics for acute postoperative pain in adults - an overview of Cochrane reviews
- PMID: 26461263
- PMCID: PMC6485338
- DOI: 10.1002/14651858.CD011407.pub2
Adverse events associated with single dose oral analgesics for acute postoperative pain in adults - an overview of Cochrane reviews
Abstract
Background: This is an update of a Cochrane overview published in Issue 9, 2011; that overview considered both efficacy and adverse events. This overview considers adverse events, with efficacy dealt with in a separate overview.Thirty-nine Cochrane reviews of randomised trials have examined the adverse events associated with individual drug interventions in acute postoperative pain. This overview brings together the results of those individual reviews.
Objectives: To provide an overview of adverse event rates associated with single-dose oral analgesics, compared with placebo, for acute postoperative pain in adults.
Methods: We identified systematic reviews in The Cochrane Database of Systematic Reviews on The Cochrane Library through a simple search strategy. All reviews were overseen by a single review group. We extracted information related to participants experiencing any adverse event, and reports of serious adverse events, and deaths from the individual reviews.
Main results: Information was available from 39 Cochrane reviews for 41 different analgesics or analgesic combinations (51 drug/dose/formulations) tested in single oral doses in participants with moderate or severe postoperative pain. This involved around 350 unique studies involving about 35,000 participants. Most studies involved younger participants with pain following removal of molar teeth.For most nonsteroidal anti-inflammatory drugs (NSAIDs), paracetamol, and combinations not containing opioids, there were few examples where participants experienced significantly more or fewer adverse events than with placebo. For aspirin 1000 mg and diflunisal 1000 mg, opioids, or fixed-dose combination drugs containing opioids, participants typically experienced significantly more adverse events than with placebo. Studies of combinations of ibuprofen and paracetamol reported significantly fewer adverse events.Serious adverse events were rare, occurring a rate of about 1 in 3200 participants.Most reviews did not report specific adverse events.
Authors' conclusions: Despite ongoing problems with the measurement, recording, and reporting of adverse events in clinical trials and in systematic reviews, the large amount of information available for single oral doses of analgesics provides evidence that adverse events rates are generally similar with active drug and placebo in these circumstances, except at higher doses of some drugs, and in combinations including opioids.
Conflict of interest statement
SD has no declarations of interest relevant to this review.
PJW has no declarations of interest relevant to this review.
RAM has no declarations of interest relevant to this review.
DA has no declarations of interest relevant to this review.
We are funded by the NIHR for work on a series of reviews informing the unmet need of chronic pain and providing the evidence for treatments of pain but this review is not supported by that funding.
This review was identified in a 2019 audit as not meeting the current definition of the Cochrane Commercial Sponsorship policy. At the time of its publication it was compliant with the interpretation of the existing policy. As with all reviews, new and updated, at update this review will be revised according to 2020 policy update.
Comment in
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Single dose oral analgesics for postoperative pain have few adverse events.Evid Based Dent. 2016 Sep;17(3):83. doi: 10.1038/sj.ebd.6401188. Evid Based Dent. 2016. PMID: 27767117
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Aceclofenac 2009
Acemetacin 2009
Aspirin 2012
Celecoxib 2013
Codeine 2010
Dexibuprofen 2009
Diclofenac 2015
Diflunisal 2010
Dihydrocodeine 2000
Dipyrone 2010
Etodolac 2009
Etoricoxib 2014
Fenbufen 2009
Fenoprofen 2011
Flurbiprofen 2009
Gabapentin 2010
Ibuprofen + caffeine 2015
Ibuprofen + codeine 2015
Ibuprofen + oxycodone 2013
Ibuprofen + paracetamol 2013
Ibuprofen 2009
Indometacin 2004
Ketoprofen and dexketoprofen 2009
Lornoxicam 2009
Lumiracoxib 2010
Mefenamic acid 2011
Meloxicam 2009
Nabumetone 2009
Naproxen 2009
Nefopam 2009
Paracetamol + codeine 2009
Paracetamol 2008
Paracetamol ± dextropropoxyphene 1999
Paracetamol ± oxycodone 2009
Piroxicam 2000
Rofecoxib 2009
Sulindac 2009
Tenoxicam 2009
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