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Fentanyl - how long does a 50 mcg/hr patch last for as the 25 lasts for 3 days?

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ElizaJane23 15 Apr 2012

Same amount of time. The medication is slowly released over 2-3 days, regardless of the dose. Some people find that the effect dwindles between 2-3 days, if this happens to you, ask for the prescription to be written "to change every 48 hours". Hopefully your insurance won't balk at this request. Take care - ElizaJane

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