How Long Does Fentenyl 100 Mcg Stay In Your System

I took a Fentenyl patch 100 mcg. and cut it in fourths. It helped tremendously with my horrible back pain. I need to know how long this stays in my system. T Y

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Hi Frankie,

If this is in regards to drug testing, information I've gathered states that Fentanyl can be detected in your urine for up to 8-24 hrs after your last dose.

-It can be detected in your blood for up to 12 hours after your last dose.
-It can be detected in your saliva for up to 1-2 days after your last dose.
-It can be detected in your hair for up to 90 days after your last dose.

Hopefully this info can give you a rough estimate of how long the drug remains in various parts of your system (at least at a detectable level).

Has anyone else experienced different time frames for getting Fentanyl out of your system, other than what's noted above?

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