Table 1. Results of post-operative observation in three groups.
| Control group (%) | Ondansetron (%) | Meperidine (%) | P value | |
| Shivering | 15 (50.0) | 4 (13.3) | 6 (20.0) | 0.003 |
| Nausea | 3 (10.0) | 3 (10.0) | 3 (10.0) | 1.00 |
| Vomiting | 2 (6.7) | 0 | 1 (3.3) | 0.30 |
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