Perioperative medicine & outcomes

Preoperative Olanzapine and Quality of Recovery after Ambulatory Surgery: A Randomized Clinical Trial

AnesthesiologyPublished Randomised controlled trial

Primary result · QoR-40Result — go to the resultDifference 9.0 points 95% CI 6.1–11.8

Authors' conclusion

When combined with dexamethasone and ondansetron, a single preoperative dose of 5 mg olanzapine improved global quality of recovery after discharge from ambulatory surgery.

Study context

Population
Female patients 18 to 50 yr undergoing ambulatory surgery under GA
Participants
384 patients
Comparison
Olanzapine vs Placebo
  • Olanzapinen = 191
  • Placebon = 193reference
Primary endpoint
QoR-40
Follow-up
POD 1
Methodological detailssingle-center, double-blind, placebo-controlled
  • Single-center
  • Double-blind
  • Placebo-controlled

Primary result

As reported in the abstract

Difference

9.0 points

95% CI 6.1–11.8

P < 0.001

Olanzapine vs Placebo
difference 9.0 points (95% CI 6.1–11.8); P < 0.001

Secondary outcomes

OutcomeDifference (points) (95% CI)P value
QoR-40 · POD 2Significant after false discovery rate correction4.8 (2.0–7.6)nominal P = 0.001
OutcomeOR (95% CI)
Any nausea · POD 10.43 (0.28–0.66)
Severe nausea · POD 10.26 (0.14–0.48)
Any nausea · POD 20.48 (0.30–0.76)
Severe nausea · POD 20.65 (0.30–1.40)

PACU LOS

Did not differ between groups

Original publication

Preoperative Olanzapine and Quality of Recovery after Ambulatory Surgery: A Randomized Clinical Trial. Anesthesiology. Published 20 May 2026. doi:10.1097/aln.0000000000006166

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