A member asked:

How long does fentanyl transdermal patch 75mcg/hr stay in system woman, 39, 168 lbs, on chronic opiod therapy?

A doctor has provided 1 answer
Dr. Richard Pollard answered

Specializes in Anesthesiology

51 hours: Once the patch is removed the medication has a half life of 17 hours. That means it is mostly gone by three half lives, or 51 hours. However, the chronic opioids that you are taking will still be in your system.

Answered 4/24/2015

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