Når IONSYS monteres uden at aktivere strømmen, var den gennemsnitlige absorption af fentanyl i løbet af et døgn 2, 3 mikrogram fentanyl/ time, hvilket viser den minimale, passive leverance.
When IONSYS is applied without activating the current, the average absorption rate of fentanyl over 24 hours was 2.3 micrograms fentanyl/ hour, indicating minimal passive delivery.