| Methods | Y; B; Y; Y; N; N | |
| Participants | 80 women; gynaecological; ASA1,2; 18‐70 (mean 41); exc' pregnancy/lactation, Parkinsonism, GI disease, study drug allergy, antipsychotic, antihistamine | |
| Interventions | Induction AND postoperative Either: PLACEBO twice; or DROPERIDOL 1mg i.v. then PLACEBO/DROPERIDOL 0.02mg/ml or 0.04mg/ml PCA | |
| Outcomes | Vomiting; rescue antiemetic. Postop 0‐24 hours. | |
| Notes | Unclear how retching categorized. | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Allocation concealment (selection bias) | Unclear risk | B ‐ Unclear |
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