Et IONSYS- system indeholder 10, 8 mg fentanylhydroklorid ækvivalent med 9, 7 mg fentanyl og giver 40 mikrogram fentanyl pr. dosis, op til et maksimum på 3, 2 mg (80 doser).
Each IONSYS system contains 10.8 mg fentanyl hydrochloride equivalent to 9.7 mg of fentanyl and delivers 40 micrograms fentanyl per dose, to a maximum of 3.2 mg (80 doses).