Gennemsnitlige, maksimale plasmakoncentrationer af fentanyl spænder fra 0, 2 til 1, 3 ng/ ml (efter administration af 100 til 800 µg Rapinyl) og nås inden for 22, 5 til 240 minutter.
Mean maximal plasma concentrations of fentanyl range from 0.2 to 1.3 ng/ ml (after administration of 100 to 800 µg Rapinyl) and are reached within 22.5 to 240 minutes.