•Morphine antinociception is sexually dimorphic one day after CFA-induced persistent nociception.•Sex differences in morphine antinociception were resolved seven days after CFA treatment.•Morphine conditioned place preference in CFA treated rats was enhanced over time.•Sexually dimorphic morphine antinociception is impacted by the chronicity of pain.
Behavioural Brain Research – Elsevier
Published: May 2, 2018
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