Figure 4From: In vivo antinociception of potent mu opioid agonist tetrapeptide analogues and comparison with a compact opioid agonist - neurokinin 1 receptor antagonist chimeraDose and time dependent analgesic effects of AN81 after s.c. administration in the radiant heat tail-flick test. AN81 or morphine was injected s.c. into CD1 mice. Data are %MPE ± SEM of 5-6 mice.Back to article page