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Haeseler G, Foadi N, Ahrens J, Dengler R, Hecker H, Leuwer M. Tramadol, fentanyl and sufentanil but not morphine block voltage-operated sodium channels. Pain. 2006 Dec 15;126(1-3):234–44. doi: 10.1016/j.pain.2006.07.003. PMID: 16949748. |