how long will fentanyl show up in urine.
tia!
tia!
Fentanyl is difficult to test for. It does not show up in the urine dip stick type tests, although some forms of this test are starting to show up. The accuracy and validity of the tests are not yet proven.
Liquid chromatography/mass spectrometry is currently used to detect fentanyl. Fentanyl and its two metabolites (norfentanyl and despropionylfentanyl) are detectable in urine for at least 24 hours. By 72 hours, fentanyl is undetectable. Norfentanyl is present in larger quantities than fentanyl and is detected up to 96 hours after ingestion.
Liquid chromatography/mass spectrometry is currently used to detect fentanyl. Fentanyl and its two metabolites (norfentanyl and despropionylfentanyl) are detectable in urine for at least 24 hours. By 72 hours, fentanyl is undetectable. Norfentanyl is present in larger quantities than fentanyl and is detected up to 96 hours after ingestion.
Is GC MS testing more or less accurate than liquid chromatography/mass spectrometry in detecting fentanyl metabolites?
I haven't had fentanyl since September 1st and I'm still failing my urine screenings I'm not doing anything at this point y is it still showing up
Health Hero
1626 posts
Hi, several factors can influence the detection time for drugs, including fentanyl, in a urine drug screen:
1. Metabolism: Everyone's body metabolizes drugs at different rates. Factors affecting metabolism include age, overall health, liver function, and more.
2. Amount and Frequency of Use: Chronic and heavy use of a drug may result in the drug remaining detectable for a longer period than infrequent or one-time use.
3. Drug Sensitivity: Different drug tests have different sensitivities. Some tests may be more sensitive and can detect smaller amounts of the drug.
4. Body Mass and Fat: Drugs can be stored in fat tissues and then slowly released over time. People with more body fat might store drugs for longer periods.
5. Hydration: The concentration of urine can affect drug detection. If you're dehydrated, drug concentrations may be higher.
6. Other Factors: Kidney function, physical activity, and other factors can also influence how long a drug remains detectable in your system.
If you believe there is an error with your drug test results, request a confirmatory test. If there is doubt about the accuracy of a urine drug screen, a confirmatory test, such as gas chromatography/mass spectrometry (GC/MS), can be done. GC/MS is a more specific and precise testing method.
Also, review your medications and dietary supplements. Some medications, supplements, and even certain foods might cause false positives on drug tests. Ensure you provide a complete list of everything you are taking to your healthcare provider.
1. Metabolism: Everyone's body metabolizes drugs at different rates. Factors affecting metabolism include age, overall health, liver function, and more.
2. Amount and Frequency of Use: Chronic and heavy use of a drug may result in the drug remaining detectable for a longer period than infrequent or one-time use.
3. Drug Sensitivity: Different drug tests have different sensitivities. Some tests may be more sensitive and can detect smaller amounts of the drug.
4. Body Mass and Fat: Drugs can be stored in fat tissues and then slowly released over time. People with more body fat might store drugs for longer periods.
5. Hydration: The concentration of urine can affect drug detection. If you're dehydrated, drug concentrations may be higher.
6. Other Factors: Kidney function, physical activity, and other factors can also influence how long a drug remains detectable in your system.
If you believe there is an error with your drug test results, request a confirmatory test. If there is doubt about the accuracy of a urine drug screen, a confirmatory test, such as gas chromatography/mass spectrometry (GC/MS), can be done. GC/MS is a more specific and precise testing method.
Also, review your medications and dietary supplements. Some medications, supplements, and even certain foods might cause false positives on drug tests. Ensure you provide a complete list of everything you are taking to your healthcare provider.