| Methods | N; B; Y; Y; Y; Y | |
| Participants | 160 adults; 125 women; ASA1,2; lap' chole'; exc' study drug allergy, N&V/antiemetic, drug abuse, renal/liver/heart/lung/CNS/blood or endocrine disease | |
| Interventions | Induction Either: PLACEBO; or DROPERIDOL 1.25mg i.v.; or METOCLOPRAMIDE 10mg; or ONDANSETRON 4mg | |
| Outcomes | Nausea; vomiting. Postop 0‐1; 1‐4; 4‐24; 0‐24 hours. | |
| Notes | Male/female incidences not reported. No side effects. Unclear how retching categorized or if vomiters nauseated or categorized once or twice. | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Allocation concealment (selection bias) | Unclear risk | B ‐ Unclear |
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