Cyclazocine: Cyclazocine is a mixed opioid agonist/antagonist related to dezocine, pentazocine and phenazocine. It is in the benzomorphan and benzazocine family of drugs. It is a κ-opioid receptor agonist and μ-opioid receptor partial agonist, and also has high affinity for the δ-opioid receptor.
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