Quick answer: No. Seroquel (quetiapine) is not part of standard 5-panel or DOT/SAMHSA urine drug tests, so it does not normally appear. Rarely, it can cause a false-positive on some tricyclic antidepressant or methadone immunoassays, so any presumptive positive should go to lab confirmation by GC-MS or LC-MS/MS.
- Standard panels (THC, cocaine, opiates, amphetamines, PCP) do not target quetiapine.
- Cross-reactivity with tricyclic antidepressant (TCA) and methadone immunoassays has been reported in case literature.
- Never act on a presumptive screen alone; confirm at a laboratory and have a medical review step.
What Seroquel is and why it matters to testing programs
Seroquel is a brand name for quetiapine, an atypical antipsychotic. According to MedlinePlus (National Library of Medicine, quetiapine drug information page), it is prescribed for conditions such as schizophrenia and bipolar disorder. Clinics, courts, probation offices and employers regularly see donors who disclose it, so your staff need a clear, consistent response.
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Does Seroquel show up on common drug tests?
Immunoassay screens, which include most urine cups and dip cards, use antibodies aimed at a specific drug or drug class. Quetiapine is not the target of the standard panels used in workplace testing. The federal panel under the HHS Mandatory Guidelines, used for DOT-regulated testing (U.S. DOT Office of Drug and Alcohol Policy and Compliance), covers marijuana metabolites, cocaine, opioids, amphetamines and phencyclidine. Quetiapine is not on it.
Where false positives can occur
Quetiapine has a tricyclic-like chemical structure. Published case reports describe false-positive results on some TCA immunoassays, and occasionally on methadone assays. Commercial TCA screens commonly use a 1,000 ng/mL cutoff and methadone screens commonly use 300 ng/mL, but cutoffs and cross-reactivity vary by manufacturer. Check each product's package insert for its cutoff and listed cross-reactants.
| Test type | Targets quetiapine? | Risk of Seroquel-related result | Recommended action |
|---|---|---|---|
| 5-panel urine cup or dip card | No | Very low | Read as normal; no special step |
| DOT/SAMHSA 5-panel (lab) | No | Very low | MRO review of any non-negative |
| Panels adding TCA | No | Possible cross-reactivity | Send presumptive positive for confirmation |
| Panels adding methadone | No | Rare cross-reactivity | Send presumptive positive for confirmation |
| Lab GC-MS / LC-MS/MS | Only if specifically tested | Distinguishes the actual compound | Use as the confirmation standard |
How to read and handle results
- Check that the device is unexpired and the specimen temperature is in range at collection.
- Read the result within the window stated in the package insert. On most cups and dip cards, a line in the control region plus a line in a drug region means negative for that drug; a missing drug line means a presumptive positive.
- Treat any non-negative as presumptive only. An instant screen is not definitive.
- Send the specimen for laboratory confirmation by GC-MS or LC-MS/MS.
- Have a medical review step, such as an MRO for DOT programs, so legitimate prescriptions are considered before any action.
Checklist for programs that see donors on Seroquel
- Choose panels that match your policy; do not add TCA or methadone unless you need them.
- Confirm each device's FDA clearance and CLIA-waived status on the package insert and manufacturer documentation.
- Review the insert's cross-reactivity table for quetiapine and related compounds.
- Document the donor's disclosure of prescriptions separately from the collection result.
- Require lab confirmation before any adverse decision.
- Train staff not to ask about diagnoses beyond what policy and law allow.
- Keep chain-of-custody records for specimens sent to the lab.
Choosing supplies for the screening step
If you run point-of-collection screening, the panel you choose determines your exposure to cross-reactivity. ASC supplies drug test cups in a range of panel configurations for clinics, courts, treatment centers and employers. For help matching a panel to your policy and arranging lab confirmation, contact American Screening Corp. Employers building a full hiring process can also pair testing with background screening through our sister division, Reveal Background.
Other test types
Oral fluid tests and breathalyzers do not target quetiapine either. Breath alcohol devices measure ethanol only. Oral fluid panels follow the same drug classes as urine, so the same rule applies: a non-negative screen needs confirmation.
FAQ
Does Seroquel cause a positive on a standard 5-panel urine test?
Not normally. Quetiapine is not a target of the standard 5-panel, so a properly working test should read negative for it.
Can Seroquel cause a false positive?
Rarely. Case reports describe cross-reactivity with some tricyclic antidepressant and methadone immunoassays. Lab confirmation by GC-MS or LC-MS/MS resolves it.
Is Seroquel included in DOT drug tests?
No. DOT-regulated testing uses the HHS-specified panel of marijuana, cocaine, opioids, amphetamines and PCP, and quetiapine is not on it.
What should we do with a presumptive positive from a donor on Seroquel?
Do not act on the screen alone. Send the specimen for laboratory confirmation and use a medical review process to consider the prescription before any decision.
Sources
- MedlinePlus (NLM): Quetiapine
- U.S. DOT Office of Drug and Alcohol Policy and Compliance
- SAMHSA: Workplace Drug Testing
This article is general information, not legal or medical advice.
