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Butorphanol

美妥芬諾
Mechanism of action:
Butorphanol 是一種鴉片類藥物(opioid),具有 κ-阿受體促效作用與 μ-阿片受體部分拮抗或弱促效作用。Butorphanol 主要活性在 κ-阿片受體,能抑制腦與脊髓的疼痛訊號傳 遞;同時也會抑制鈣離子進入神經末梢,減少神經傳導物質(如 substance P、glutamate)釋放。對於微弱的 μ-阿片受體作用,使其 μ-受體相關效應相對受限。
Reference(s):
1. Gear RW et al. (1999). The kappa opioid nalbuphine produces gender- and dose-dependent analgesia and antianalgesia in patients with postoperative pain. Pain.
2. Fan LW et al. (2002). Withdrawal from dependence upon butorphanol uniquely increases kappa(1)-opioid receptor binding in the rat brain. Brain Res Bull.
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