Quick answer
Fluoxetine (Prozac) is typically detectable in urine for screen-interference reports are rare and dose-dependent after any use. It is screened on standard 5-panel, 10-panel, 12-panel drug tests.
Screened on: 5-panel 10-panel 12-panel
Typical cutoff: Not directly screened.
Detection window by test type
| urine | |
|---|---|
| Any use | screen-interference reports are rare and dose-dependent |
| saliva | |
| Any use | n/a |
| hair | |
| Any use | n/a |
| blood | |
| Any use | n/a |
Ranges reflect typical published detection windows and vary with dose, frequency, body composition, hydration and the assay used.
Key details
Prozac itself is never a panel target. Isolated case reports tie high-dose fluoxetine to amphetamine-screen anomalies; routine SSRI users face negligible risk on modern assays.
Long half-life (fluoxetine ~4–6 days; norfluoxetine 7–15) makes washout periods impractical — irrelevant anyway since SSRIs aren't tested.
False positives & cross-reactivity
- Rare amphetamine-screen cross-reactivity case reports.
Frequently asked questions
How long does fluoxetine (prozac) stay in your system?
In urine, typical detection is screen-interference reports are rare and dose-dependent (any use). Hair can detect use for up to 90 days and saliva/blood windows are usually shorter.
Will fluoxetine (prozac) show up on a standard drug test?
Yes — Fluoxetine (Prozac) is screened on standard panels (5-panel, 10-panel, 12-panel).
Can anything cause a false positive for fluoxetine (prozac)?
Rare amphetamine-screen cross-reactivity case reports.
How accurate are these detection windows?
They are typical ranges from published literature and assay documentation, not guarantees. Clearance depends on dose, frequency, metabolism and the specific test cutoff used.
Related substances
Cite this page
DrugPanels. “Fluoxetine (Prozac) Detection Time.” https://drugpanels.com/detection/fluoxetine/. Accessed 2026-09-10.
Sources
- Brahm NC et al., Commonly prescribed medications and potential false-positive drug test results, Mayo Clinic Proceedings 2008 — Mayo Clinic Proceedings — pubmed.ncbi.nlm.nih.gov
- DailyMed structured product labeling — U.S. National Library of Medicine — dailymed.nlm.nih.gov
Detection windows describe typical ranges from the published literature and assay documentation; individual results vary. See our methodology.