Intervention Review

Opioids for neonates receiving mechanical ventilation

  1. Roberto Bellù1,*,
  2. Koert A de Waal2,
  3. Rinaldo Zanini3

Editorial Group: Cochrane Neonatal Group

Published Online: 23 JAN 2008

Assessed as up-to-date: 31 AUG 2007

DOI: 10.1002/14651858.CD004212.pub3

How to Cite

Bellù R, de Waal KA, Zanini R. Opioids for neonates receiving mechanical ventilation. Cochrane Database of Systematic Reviews 2008, Issue 1. Art. No.: CD004212. DOI: 10.1002/14651858.CD004212.pub3.

Author Information

  1. 1

    Ospedale "Manzoni" -Lecco, Neonatal Intensive Care Unit, Lecco, Italy

  2. 2

    Academic Medical Centre, Neonatology, Amsterdam, Netherlands

  3. 3

    Ospedale "A. Manzoni" - Lecco, Neonatal Intensive Care Unit, Lecco, Italy

*Roberto Bellù, Neonatal Intensive Care Unit, Ospedale "Manzoni" -Lecco, Via Eremo 9, Lecco, 23900, Italy.

Publication History

  1. Publication Status: Edited (no change to conclusions)
  2. Published Online: 23 JAN 2008




  1. Top of page
  2. Abstract
  3. Plain language summary


Mechanical ventilation is a potentially painful and discomforting intervention widely used in neonatal intensive care units. Newborn babies (neonates) demonstrate increased sensitivity to pain, which may affect clinical and neurodevelopmental outcomes. The use of drugs that reduce pain might be important in improving survival and neurodevelopmental outcomes.


To determine the effect of opioid analgesics (pain-killing drugs derived from opium e.g. morphine), compared to placebo, no drug, or other non-opioid analgesics or sedatives, on pain, duration of mechanical ventilation, mortality, growth and neurodevelopmental outcomes in newborn infants on mechanical ventilation.

Search methods

Electronic searches included: the Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 2, 2007); MEDLINE (1966 to June 2007); EMBASE (1974 to June 2007); and CINAHL (1982 to 2007). Previous reviews and lists of relevant articles were cross-referenced.

Selection criteria

Randomised controlled trials or quasi-randomised controlled trials comparing opioids to a control, or to other analgesics or sedatives in newborn infants on mechanical ventilation.

Data collection and analysis

Data were extracted independently by two review authors. Categorical outcomes were analysed using relative risk and risk difference; and continuous outcomes with weighted mean difference or standardised mean difference. A fixed effect model was used for meta-analysis except where heterogeneity existed, in which case a random effects model was used.

Main results

Thirteen studies on 1505 infants were included. Infants given opioids showed reduced premature infant pain profile (PIPP) scores compared to the control group (weighted mean difference -1.71; 95% confidence interval -3.18 to -0.24). Differences in execution and reporting of trials mean that this meta-analysis should be interpreted with caution. Heterogeneity was significantly high in all analyses of pain, even when lower quality studies were excluded and analysis limited to very preterm newborns. Meta-analyses of mortality, duration of mechanical ventilation, and long and short-term neurodevelopmental outcomes showed no statistically significant differences. Very preterm infants given morphine took significantly longer to reach full enteral feeding than those in control groups (weighted mean difference 2.10 days; 95% confidence interval 0.35 to 3.85). One study compared morphine with a sedative: the treatments showed similar pain scores, but morphine had fewer adverse effects.

Authors' conclusions

There is insufficient evidence to recommend routine use of opioids in mechanically ventilated newborns. Opioids should be used selectively, when indicated by clinical judgment and evaluation of pain indicators. If sedation is required, morphine is safer than midazolam. Further research is needed.


Plain language summary

  1. Top of page
  2. Abstract
  3. Plain language summary

Opioids for neonates receiving mechanical ventilation

There is insufficient evidence to recommend routine use of opioids (e.g. morphine) to reduce pain in newborn babies (full-term or preterm) with breathing difficulties on breathing machines. Breathing machines, which are widely used for newborn full-term and preterm babies with breathing problems, may cause babies pain. Since newborn babies are very sensitive to pain - which may have a bad effect on future development - pain-reduction with drugs (including opioids such as morphine) might be very important. This review found no evidence for routine use of opioids for newborns on breathing machines. Although relief of pain was variable, opioids were no better or worse for babies (in terms of death, strokes, future development, duration of ventilation or hospital stay) than other drugs or placebo. Further research is needed.