fentnyl and drug tests

[Pander Bear]

My urine is currently subject to close scrutiny (of the simple immuno-assay kind), so I'm going down the list of things i can do without any fear of being caught. Can fentnyl be detected as an opioid on a simple urine test. My understanding is that the tests detect morphine, which most everything is metabolized into. Yet, ive been unable to find any information on fentnyl's structure.
any help would be appreciated.

 

[Crimson Cloud]

Fentanyl is metabolized into norfentanyl, 4-N-anilinopiperidine and propionic acid, not morphine. I don't know if it's tested for in standard drug screens, but 20% of a dose is excreted in the urine as metabolites and 10-25% unchanged fentanyl within 8 hours and 70% within 4 days.
[ 09 February 2003: Message edited by: Crimson Cloud ]