อนุทิน #91800

tip converting fentanyl patch and Morphine oral

100 "mcg per hr" Fentanyl  :about  x2 to 2.5 = 200-250  in mg per day of oral Morphine 

and

100 mg per day oral Morphine : about  /2 to 2.5 = 50-40 in mcg per hr of Fentanyl patch

Reasons
Fentanly 100 times potent : 100 mcg = 10 mg MO oral
24 hrs                                            = 240 mg MO oral  per day

Lower end for renal impairment
Higher end for opioid intolerant 

Ref: http://www.mywhatever.com/cifwriter/library/eperc/fastfact/ff02.html

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