Fentanyldrug info
72 HR fentanyl 0.0375 MG/HR Transdermal System
What it is used for
Fentanyl transdermal system is indicated for the management of severe and persistent pain in opioid tolerant patients, that requires an opioid analgesic and that cannot be adequately treated with alternative options, including immediate-release opioids. Patients considered opioid-tolerant are those who are taking, for one week or longer, at least 60 mg morphine per day, 25 mcg transdermal fentanyl per hour, 30 mg oral oxycodone per day, 8 mg oral hydromorphone per day, 25 mg oral oxymorphone per day, 60 mg oral hydrocodone per day, or an equianalgesic dose of another opioid. Limitations of Use:
Because of the risks of addiction, abuse, misuse, overdose, and death, which can occur at any dosage or duration and persist over the course of therapy, reserve opioid analgesics, including fentanyl transdermal system for use in patients for whom alternative treatment options are ineffective, not tolerated or would be otherwise inadequate to provide sufficient management of pain.
Fentanyl transdermal system is not indicated as an as-needed (prn) analgesic. Fentanyl transdermal system contains fentanyl, an opioid agonist, and is indicated for the management of severe and persistent pain in opioid tolerant patients, that requires an opioid analgesic and that cannot be adequately treated with alternative options, including immediate-release opioids. Patients considered opioid-tolerant are those taking, for one week or longer, at least 60 mg oral morphine per day, 25 mcg transdermal fentanyl per hour, 30 mg oral oxycodone per day, 8 mg oral hydromorphone per day, 25 mg oral oxymorphone per day, 60 mg oral hydrocodone per day, or an equianalgesic dose of another opioid. Limitations of use:
Because of the risks of addiction, abuse, misuse, overdose, and death, which can occur at any dosage or duration and persist over the course of therapy, reserve opioid analgesics, including fentanyl transdermal system, for use in patients for whom alternative treatment options are ineffective, not tolerated or would be otherwise inadequate to provide sufficient management of pain.
Fentanyl transdermal system is not indicated as an as-needed (prn) analgesic.
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective December 15, 2025. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
Description
The system contains fentanyl, an opioid agonist, for transdermal administration. The amount of fentanyl released from each system per hour is proportional to the surface area (25 mcg/hour per 6.25 cm 2 ). The composition per unit area of all transdermal system sizes is identical. Strength (mcg/hour) Size (cm 2 ) Fentanyl Content (mg) 12 Nominal delivery rate is 12.5 mcg/hour 3.13 1.28 25 Nominal delivery rate per hour 6.25 2.55 37.5 9.38 3.83 50 12.5 5.10 62.5 15.63 6.38 75 18.75 7.65 87.5 21.88 8.93 100 25 10.20 The molecular weight of fentanyl base is 336.5, and the molecular formula is C 22 H 28 N 2 O. The n‑octanol: water partition coefficient is 860:1. The pKa is 8.4. The chemical name is N-Phenyl-N-[1-(2-phenylethyl)-4-piperidinyl] propanamide.
The structural formula is: Fentanyl transdermal system is a rectangular translucent system with rounded corners. “Fentanyl”, dosage strength and diagonal lines are printed in blue ink on each system. Each system is comprised of a polyester release liner and two functional layers. Proceeding from the outer surface toward the surface adhering to skin, these functional layers are: 1) a backing layer of translucent polyolefin film with blue print; 2) a drug-in-adhesive layer containing fentanyl as the active ingredient and dimethicone NF and silicone adhesive as inactive ingredients. Before use, a polyester release liner covering the drug-in-adhesive layer is removed and discarded. Fentanyl transdermal systems are packaged with additional pieces of protective film above and below the system within each pouch. These are discarded at the time of use. Fentanyl Structural Formula Parts of the Fentanyl Transdermal System
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective December 15, 2025. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
This page reproduces regulatory text for reference. It is not medical advice, and KenyRx is not a pharmacy or a prescriber. Talk to a doctor or pharmacist about whether a medicine is right for you.
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