De iagttagne små forskelle anses ikke for at have klinisk betydning og tyder på, at Fentanyl "ratiopharm" har en noget mere udtalt depotvirkning, hvilket da også er forventeligt for et matrixplaster i forhold til et reservoirplaster.
The small differences observed are not deemed to be of clinical importance and suggests that Fentanyl ratiopharm has a somewhat more pronounced prolonged release profile, which is as expected for a matrix patch in comparison with a reservoir patch.