naloxone hydrochloride

Definition / meaning of naloxone hydrochloride

The hydrochloride salt of naloxone, a thebaine derivate with opioid antagonist activity. Naloxone binds to opioid receptors in the CNS in a competitive manner, reversing or inhibiting characteristic opioid effects, including analgesia, euphoria, sedation, respiratory depression, miosis, bradycardia, and physical dependence. This agent binds to mu-opioid receptors with a high affinity, and a lesser degree to kappa- and gamma-opioid receptors.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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