and I have to admitt I don't understand how these things work. My old patch was "Mylan" and it was just a patch. This new one is bigger and has jelly stuff on the inside. That makes it seem more dangerous. How do these things work? How do they know how much an hour to put out especially for three days? What if it gets a hole in it? I have touble keeping it on. Is there any spot thats better--on a woman? What if there is jelly still in the patch when its time to take it off, does that mean it didn't work right? It never seems to last long enough and that third day I feel like crap. Anyway mainly how do they work hour by hour??? Thanks, Debb
Fentanyl patches have either medication embedded in the adhesive or they have a gel reservoir. With the gel reservoir types, there is a permeable membrane that allows so much drug through by osmosis (movement of particles from an area of high concentration-the gel-to an area of low concentration-the fat layers under the skin-through a permeable membrane) It is this membrane that controls the release of the medication. Neither type is more dangerous than the other. If the gel type gets a hole, it needs to be discarded because the mechanism to release the medication in a controlled manner is compromised. Even if after three days, there is still gel, that doesnt mean you didnt get the medication. The medication that should have been released has been released. Yes, there is a certain amount of medication left in both kinds of patches after use. Even the ones with medication embedded in the adhesive, like your Mylan's, if they were to stick to a non-opioid tolerant person after the person they were prescribed for used them, they could still release a fatal amount of medication. Old used patches should be folded in half sticky side to sticky side when they are disposed of. Recommended spots are above the shoulder area on your back, on the chest above the breast or on the rib area or abdomen above the belt line or the upper arm/deltoid areas. You can by clear overlays like tegaderm or bio-occlusive to put over the patch to help them stick.
I have switched from mscontin to the fentanyl patch because I was having trouble holding pills down. Although the patches claim to provide 3 days of medication... they don't. I have had some trouble with the patch. First off... I can't keep them on for 3 days. My skin seems to repel them. My Dr. Recommend ed something called "on site" which I bought on the internet. It works well. But I still replace them every other day. I also use the Watson brand and have had two completely empty patches straight out of the package... so look at them before you put them on!
- Fentanyl Information for Consumers
- Fentanyl Information for Healthcare Professionals (includes dosage details)
- Side Effects of Fentanyl (detailed)
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