Group M (325)

Group F (325)

Pruritus (n)

3% (9)

2% (6)

Nause (n)

6.8% (22)

5% (16)

Respiratory depression (n)

0% (0)

0% (0)

Seadation score (n, 2, 3, 4)

300/20/5

298/15/12

Bradicardia

10% (32)

12% (39)