The Effect of Ondansetron on the Analgesic Efficacy of Tramadol in Patients Undergoing Laparoscopic Cholecystectomy

Figure 4

Nausea score on numerical rating scale (NRS) (0–10) in the postoperative 24 hours. There was no difference between the two groups during the study period. Group O, n = 28; Group S n = 27.