Quetiapine (Seroquel) Detection Time

Atypical antipsychotic · Prescription only, unscheduled.

Quick answer

Quetiapine (Seroquel) is typically detectable in urine for interference ~2–4 days post-dose 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 screened; documented methadone-screen and TCA-screen cross-reactivity.

Detection window by test type

urine
Any useinterference ~2–4 days post-dose
saliva
Any usen/a
hair
Any usen/a
blood
Any usen/a

Ranges reflect typical published detection windows and vary with dose, frequency, body composition, hydration and the assay used.

Key details

Seroquel is never a target, but it carries TWO documented screen-false-positive risks: methadone strips and TCA strips. Both resolve with GC–MS confirmation and MRO documentation.

False positives & cross-reactivity

  • Methadone-screen FP (multiple published cases); TCA-screen FP (assay-dependent).

Frequently asked questions

How long does quetiapine (seroquel) stay in your system?

In urine, typical detection is interference ~2–4 days post-dose (any use). Hair can detect use for up to 90 days and saliva/blood windows are usually shorter.

Will quetiapine (seroquel) show up on a standard drug test?

Yes — Quetiapine (Seroquel) is screened on standard panels (5-panel, 10-panel, 12-panel).

Can anything cause a false positive for quetiapine (seroquel)?

Methadone-screen FP (multiple published cases); TCA-screen FP (assay-dependent).

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.

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Related substances

Adderall / amphetaminesStimulant (amphetamine / dextroamphetamine / lisdexamfetamine)AlcoholCentral nervous system depressant (ethanol)Ambien (zolpidem)Z-drug hypnotic (GABA-A alpha-1 selective)Anabolic steroidsAnabolic-androgenic steroid hormonesAshwagandhaAdaptogenic herb supplementBaclofenGABA-B agonist muscle relaxant

Cite this page

DrugPanels. “Quetiapine (Seroquel) Detection Time.” https://drugpanels.com/detection/seroquel/. 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
  • Peer-reviewed literature (PubMed) — U.S. National Library of Medicine — pubmed.ncbi.nlm.nih.gov

Detection windows describe typical ranges from the published literature and assay documentation; individual results vary. See our methodology.

Reviewed for sourcing accuracy against SAMHSA, FDA and peer-reviewed references. Last updated 2026-09-10. Educational information only — not medical or legal advice.