What happens if I was to wear it longer than the 3 days. I am trying to stretch them out and make them last longer. But will it still put out medicine after that 72 hour mark?
Can I ask... why would you want to do that? There would be no medicine left. The medicine is released into your system on an... "hourly" (let's say) basis... for 72 total hours, after which, there is nothing left to give. I mean you can definitely go without, if you want, but just remember that you need to stay on top of your pain because if it gets ahead of you, it's very difficult to get on top of it again.
Fentanyl patches are meant to last 3 days. Some patients find that they only get benefit from them for 48 hours, and their doctors prescribe them to switch them out every 2 days... but no, I've never heard of them lasting longer then three.
There may be a tiny bit left, but if you go through all that technical data that comes with them you will see a graph. According to the info there, 88% has left the patch after 48 hours. Some of that is still in transit through your dermal layers, but the patch is pretty spent after 48 hours. That is one reason so many doctors let you replace at 48 hours. That plus it helps prevent the drop that comes if you wait 72 hours.
I use a 50 and a 12 and still got a drop. To help with that I replace every other day with a 50 then 12 then 50 then 12...
- Fentanyl Information for Consumers
- Fentanyl Information for Healthcare Professionals (includes dosage details)
- Side Effects of Fentanyl (detailed)
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