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A member asked:
I was prescribed fentanyl patches today and forgot to ask if i end up being allergic to them, about how long would it take for a reaction to show up?
A doctor has provided 1 answer
Unlikely: You are more likely to become allergic to the glue of the patch than Fentanyl . Allergy is nearly nonexistent but it may produce GI side effects like other opiates. In general, no one can forecast how long it takes to become allergic to a drug since it may never occur at all.
Answered 11/28/2017
1.4k views
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