“…Surgical procedures varied among the RCTs and included minor surgery, laparoscopic surgery, orthopedic surgery, major abdominal surgery, pulmonary lobectomy, craniotomy, and cardiac surgery. The ondansetron dose was 4 mg in 13 RCTs [ 18 , 21 , 24 , 25 , 27 , 28 , 30 – 32 , 37 , 39 , 41 , 42 ], 8 mg in five RCTs [ 19 , 22 , 33 , 36 , 40 ], both 4 mg and 8 mg in three RCTs [ 6 , 20 , 23 ], and other doses in six RCTs [ 26 , 29 , 34 , 35 , 38 , 43 ]. All RCTs used 0.3 mg of ramosetron except for four studies [ 26 , 29 , 34 , 35 ].…”