Table 4

Mean peak ratings (± S.E.M.) of VAS adjectives sensitive to 10 mg nalbuphine and/or 10 mg morphine (ratings correspond to saline and 10-mg doses of nalbuphine and morphine, respectively)

AdjectiveSalineNalbuphineMorphine
coasting, spaced out5.3  (2.2)39.9  (7.4)* 39.3  (7.3)*
difficulty
 concentrating13.9  (5.4)40.8  (7.1)* 33.6  (7.5)
dizzy2.4  (1.0)22.8  (6.1)* 24.4  (6.6)*
drunk2.6  (0.8)15.8  (5.2)* 15.8  (4.2)*
feel bad4.3  (1.2)20.7  (5.9)* 19.6  (6.1)*
floating4.1  (1.8)40.6  (7.7)* 36.3  (7.2)*
having pleasant
 bodily sensations26.6  (7.3)47.9  (6.2)* 43.3  (7.1)*
having unpleasant
 bodily sensations9.9  (5.2)15.9  (3.1)23.9  (6.2)*
heavy, sluggish feeling4.4  (2.0)45.9  (8.4)* 41.4  (7.6)*
high3.8  (1.8)53.0  (7.1)* 46.3  (7.9)*
lightheaded8.1  (4.3)50.8  (6.2)* 46.5  (8.6)*
nauseous3.3  (0.9)15.8  (5.8)19.8  (6.4)*
sedated28.3  (6.2)50.3  (6.7)* 45.7  (8.0)*
sleepy33.6  (7.1)68.4  (7.4)* 65.1  (7.1)*
tingling3.2  (0.9)27.9  (7.1)* 35.6  (8.5)*
  • * P < .05 compared with saline