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Relation between fentanyl-induced reductions in perceived pain and attenuated increases in mean blood pressure (BP) during the cold pressor test. We identified a moderate relation between reductions in pain perception and attenuations in the increases in mean BP after low-dose fentanyl administration (postfentanyl minus prefentanyl). We conducted Pearson’s correlations and present individual data for 22 paired datasets within fentanyl trials.
