Figure 7

Effects of Dezocine on κ agonist U50,488H-induced antinociception. (A) Dezocine did not affect U50,488H-produced antinociceptive effects. (B) In the presence of μ antagonist β-FNA, pretreatment with Dezocine significantly decreased the antinociceptive effects produced by U50,488 H. Mice were injected with U50,488 H and Dezocine with or without β-FNA. After 15 min, the antinociception was measured in the abdominal constriction test. Data are presented as mean ± SEM from at least 10 mice. *p < 0.05 in comparison with U50,488 H + β-FNA group.