Table 4: Side effects in the studied groups.

M groupP groupP

Bradycardia9 (18%)14 (28%)0.67
Hypotension1 (2%)4 (8%)
Nausea and vomiting30 (60%)24 (48%)0.13
Shivering25 (50%)23 (46%)0.16
Diplopia21 (42%)19 (38%)0.24
Hypoxia14 (28%)12 (24%)0.64

(indicates significant difference between the studied groups). Bradycardia is a decrease in HR less than 50 B/min; hypotension is a decrease in mean arterial pressure by more than 20 mmHg.