Fentanyl Patch
Products Transdermal fentanyl has been approved in many countries since 1996 (Durogesic, generic). Various strengths are available. The larger the patch, the more fentanyl is released per unit time: 12 µg/h, 25 µg/h, 50 µg/h, 75 µg/h, and 100 µg/h. The opioid is legally classified as a narcotic. Structure and properties Fentanyl (C22H28N2O, Mr = … Fentanyl Patch