| 31. | Naloxone or naltrexone is the preferred human opioid receptor antagonist.
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| 32. | More recently, Canada made the opioid a Schedule I controlled drug.
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| 33. | Dezocine is a mixed agonist / antagonist of opioid receptors.
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| 34. | Semorphone is a partial agonist at ?-opioid receptors.
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| 35. | It is related to etonitazene, an opioid of significantly higher potency.
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| 36. | This inhibits the breakdown of the endogenous opioid peptides known as enkephalins.
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| 37. | Additionally, opioid drugs suppress nociceptions by binding to endogenous opioid receptors.
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| 38. | Additionally, opioid drugs suppress nociceptions by binding to endogenous opioid receptors.
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| 39. | Despite its proteolytic degradation relative to many other opioid peptides.
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| 40. | It is an agonist for the ?-opioid receptors.
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