Question 1

what could cause a false positive for fentanyl?

Accepted Answer

Errors: Be honest and offer to even pay for a better test. This seems to happen to people - so it may not surprise them. Read:  http://ehealthforum.com/health/false-positive-in-urine-test-for-fentanyl-t292331.html
Best!

Question 2

false positive on urine drug screen will ketorolac or fentanyl cause a false positive for a barbituate in a urine test.   previously had a blood test for drugs which was negative and was given these two medications in the hospital for pain and then give t

Accepted Answer

Hello. : Hello.  Ketorolac  (toradol)  is a  nonsteroidal anti-inflammatory drug used for acute pain. Fentanyl  is an opioid (narcotic) analgesic for severe pain. Neither of these are barbituates. Do not see how they would trigger a false positive on a urine drug screen.

Question 3

can someone taking morphine test positive for fentanyl although they have never taken fentanyl?

Accepted Answer

It is possible: Both drugs in the same class (opioids) so they will both show up the same.  Fentanyl is a synthetic opioid and much stronger than morphine. When testing for Morphine, it will show positive for morphine metabolites or fentanyl. Take care.

Question 4

why after a week,am i still testing positive for fentanyl?

Accepted Answer

Read this link...: Ref: Toxicologic Testing for Opiates: Understanding False-Positive and False-Negative Test Results, as found at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3505132/

Question 5

what would cause a false negative urine drug test for fentanyl patches?

Accepted Answer

Errors: 1. Not wearing the patch, an exhausted patch,  a placebo patch
2. The test was not specific for fentanyl
3. Lab error
4. Specimen misidentification.

Question 6

what is the longest my hair follicle test should be positive for fentanyl? in july my level was 1,646 and down to 327 130 days later. when can i expect a clean test?

Accepted Answer

: This will depend on how fast YOUR hair grows.  I would ask testing lab or go to PUBMED.gov and look at the most recent research.

Question 7

i had a positive toxicology for norfentanyl. i have never used fentanyl or norfentanyl. i am prescribed suboxone, gabapentin, concerta and klonopin (i?

Accepted Answer

Test for norfentanyl: Discuss cross reactivity in the meds you take with the method that was used to test you.  Suspect some cross react. Discuss with person ordering testing as they know the exact method used.

Question 8

can someone taking morphine sulfate test positive for fentanyl in a saliva drug test , although they have never taken fentanyl ever?

Accepted Answer

Yes,: Both drugs in the same class (opioids) so they will both show up the same. Fentanyl is a synthetic opioid and much stronger than morphine. When testing for Morphine, it will show positive for morphine metabolites or fentanyl. Take care.

Question 9

i take morphine sulfate 200mg 3x a day. had a routine saliva drug test. tested positive for fentanyl. is this possible? never had fentanyl ever?

Accepted Answer

Repeat lab test: Next step would be for lab to repeat test and check quality control results.

Question 10

i tested positive for coke, meth and morphine.  i use 1/yr.   will this affect my script for norco, (hydrocodone and acetaminophen)  fentanyl & concerta?  pain from 2 back surgeries.

Accepted Answer

Drugs: The side effects of all these drugs are multiple.  No one would treat chronic pain with Norco, (hydrocodone and acetaminophen) Fentanyl and concerta at once especially in someone on cocaine, methamphetamine and morphine.  You need to seek a drug dependency program and a non drug alternative to pain management.  See a doctor who specializes in pain management.

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Doctor answers about:

False positive for fentanyl

A member asked:

What could cause a false positive for fentanyl?

A member asked:

False positive on urine drug screen will ketorolac or fentanyl cause a false positive for a barbituate in a urine test. previously had a blood test for drugs which was negative and was given these two medications in the hospital for pain and then give t

A member asked:

Can someone taking morphine test positive for fentanyl although they have never taken fentanyl?

A member asked:

Why after a week,am i still testing positive for fentanyl?

A member asked:

What would cause a false negative urine drug test for fentanyl patches?

A member asked:

What is the longest my hair follicle test should be positive for fentanyl? in july my level was 1,646 and down to 327 130 days later. when can i expect a clean test?

A member asked:

I had a positive toxicology for norfentanyl. i have never used fentanyl or norfentanyl. i am prescribed suboxone, gabapentin, concerta and klonopin (i?

A member asked:

Can someone taking morphine sulfate test positive for fentanyl in a saliva drug test , although they have never taken fentanyl ever?

A member asked:

I take morphine sulfate 200mg 3x a day. had a routine saliva drug test. tested positive for fentanyl. is this possible? never had fentanyl ever?

A member asked:

I tested positive for coke, meth and morphine. i use 1/yr. will this affect my script for norco, (hydrocodone and acetaminophen) fentanyl & concerta? pain from 2 back surgeries.

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