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However, since the fentanyl patch remains in place for 3 days, we have multiplied the conversion factor by 3 (2.4 X 3 = 7.2). In this example, MME/day for ten 25 µg/hr fentanyl patches dispensed for use over 30 days would work out as follows: Example: 25 ug/hr fentanyl patch X (10 patches/30 days) X 7.2 = 60 MME/day. Using fentanyl without a prescription from a doctor, or keeping, selling or giving fentanyl patches to someone else is illegal. If you are caught you could face fines or even a prison sentence. Obtaining prescriptions for fentanyl by fraud or by not telling the Doctor about all other prescriptions for fentanyl you obtained in the last 2 months. Enter total daily dosage: mg: The 50, 75, and 100 mcg/hr patches should only be used in patients already on and tolerant to opioid therapy. This calculator, which is based roughly on information provided by ©Janssen Pharmaceuticals Inc., computes a conservative estimate of the equivalent fentanyl patch based on the patient's current opioid therapy. The software has 2 versions of 32 bit and 64 bit, however using operating system Windows Vista with 64 bit version allows you to take advantage of more RAM, thus the process in CS4 will be faster (if you install much RAM, the 32 bit system can perceive max. Only 4GB RAM even if you apply as much as 10GB RAM into the computer). Oct 29, 2011 They are a large 10.2cmx12.7cm transparent dressing and it is okay to use over the fentanyl patch. I dont use Fentanyl anymore but I still have several boxes of these so the company did send plenty-I think they send a 90 day supply free of charge.

Quick—what dose of the transdermal fentanyl patch (Duragesicâ) is equianalgesic to a 3 mg/hr morphine continuous infusion? Conversions to and from fentanyl transdermal are notoriously tricky, requiring knowledge of the published conversion data, general opioid pharmacology, and a generous dose of common sense. See also Fast Fact #36 on opioid dose conversions.

Step 1:. Calculate the 24 hr morphine dose: 3 mg/hr x 24 hrs = 72 mg IV morphine/24 hrs.

Step 2: Convert the IV dose to the equianalgesic oral morphine dose using a ratio of:
1 mg IV = 3 mg oral. Thus, 72 mg IV = 216 mg po/24 hours.

Step 3: Convert the oral morphine dose to transdermal fentanyl. There are two methods:

  • Method 1 – Standard Table. Look up the FDA prescribing information for transdermal fentanyl (Reference 1, pp 29-30). It says that 135-224 mg of morphine per 24 hours = 50 mcg/hr patch. Note: this range of morphine is very broad which may result in significant under-dosing.
  • Method 2 – Alternate Formula. In 2000, Brietbart, et al published an alternative method, based on the results of a multi-center trial by Donner, et al, that relied on a fixed dose conversion ratio to calculate the fentanyl transdermal dose. Brietbart recommended the ratio of:
    • 2 mg oral morphine/24 hr = 1 mcg/hr of transdermal fentanyl—rounded to the nearest patch size. In the case example above, 216 mg of oral morphine per day is approximately equianalgesic to the 100 mcg/hr fentanyl patch.

Note: using this formula, 25 mcg/hr of transdermal fentanyl is roughly equivalent to 50 mg oral morphine/24 hours. This dose may be excessive when used in the opioid naïve or the elderly.

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Key Considerations

  1. All equianalgesic ratios/formulas are approximations; clinical judgment is needed when making dose or drug conversions.
  2. The FDA Prescribing Information indicates that their table should only be used when converting from another opioid to transdermal fentanyl.
  3. The risk of sedation/respiratory depression with transdermal fentanyl is probably increased in the elderly or patients with liver and renal impairment due to its long half-life, thus, choose the lower end of the dosing spectrum.
  4. When in doubt, go low and slow, using prn breakthrough doses generously while finding the optimal dosage of a long-acting drug.
  5. The ‘Alternate Formula’ by Brietbart, et al is best used by experienced practitioners as it tends to give higher fentanyl patch doses than the FDA PI.

Other teaching points about Duragesic:

  • Start at the lowest dose, 12 mcg/hr, in an opioid naïve patient; there is no maximum dose.
  • Therapeutic blood levels are not reached for 13-24 hours after patch application and drug will be continue to be released into the blood for at least 24 hours after patch removal.
  • Opioid withdrawal symptoms can occur during dose conversions—care must be taken to avoid this by use of breakthrough opioids.
  • Some patients will need to have their patches changed every 48 hours.
  • The recommended upward dose titration interval is no more frequently than every 72 hours.
  • Place patches on non-irradiated, hairless skin.
  • Direct heat applied over the patch can increase drug absorption with increased toxic effects.
  • There are no data that cachectic patients have reduced efficacy due to loss of subcutaneous fat; albeit cachectic patients may require higher dosing (6).

References:

  1. Duragesic Prescribing Information. US Food & Drug Administration. http://www.accessdata.fda.gov/drugsatfda_docs/label/2005/19813s039lbl.pdf. Accessed Nov 4, 2014.
  2. Donner B, et al. Direct conversion from oral morphine to transdermal fentanyl. Pain. 1996; 64:527-534.
  3. Payne R, et al. QOL and cancer pain: satisfaction and side effects with Transdermal fentanyl versus oral morphine. J Clinical Oncology. 1998:16:1588-1593.
  4. Breitbart W. An alternative algorithm for dosing transdermal fentanyl for cancer-related pain. Oncology. 2000; 14:695-702.
  5. Gourlay GK. Treatment of cancer pain with transdermal fentanyl. The Lancet Oncology. 2001; 2:165-172.
  6. Heiskanen T, Matzke S, Haakana S et al. Transdermal fentanyl in cachectic cancer patients. Pain. 2009; 144:218-22. doi: 10.1016/j.pain.2009.04.012

Version History: This Fast Fact was originally edited by David E Weissman MD. 2nd Edition published July 2005. Current version re-copy-edited, with additional reference added, March 2009. 3rd Edition edited by Drew A Rosielle MD with additional material added November 2014.

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Fentanyl Patch Into Iv Free Download Programs

Fast Facts and Concepts are edited by Sean Marks MD (Medical College of Wisconsin) and associate editor Drew A Rosielle MD (University of Minnesota Medical School), with the generous support of a volunteer peer-review editorial board, and are made available online by the Palliative Care Network of Wisconsin (PCNOW); the authors of each individual Fast Fact are solely responsible for that Fast Fact’s content. The full set of Fast Facts are available at Palliative Care Network of Wisconsin with contact information, and how to reference Fast Facts.

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