How long taking?: Most likely tolerance. Talk to your pain doc about checking bio markers to check if you are "resistant" to opioids.
Answered 4/13/2013
5.2k views
Chronic: If taking long time it creates own metabolism or some people are ultra rapid metabolized .Talk to your physician.
Answered 5/3/2013
5.2k views
Several reasons: Tolerance, for one. You may need more or a different medicine. Ask you provider. Good luck!
Answered 12/9/2013
5.2k views
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