Quick answer
GHB is typically detectable in urine for up to about 12 hours (sometimes 24) after any use. It is not part of standard employment panels.
Not screened on standard employment panels.
Typical cutoff: Not on standard employment panels. A dedicated GC-MS/LC-MS assay is required; urine is typically screened around 10 µg/mL.
Detection window by test type
| urine | |
|---|---|
| Any use | up to about 12 hours (sometimes 24) |
| saliva | |
| Any use | 1–6 hours |
| hair | |
| Any use | up to 90 days on specialised hair testing |
| blood | |
| Any use | 4–8 hours |
Ranges reflect typical published detection windows and vary with dose, frequency, body composition, hydration and the assay used.
Key details
GHB clears the body unusually fast, so it is absent from standard 5-, 10- and 12-panel cups. Detecting it needs a dedicated assay ordered for that purpose.
The short window is why GHB is rarely caught on routine testing: urine is usually clear within about 12 hours of a dose.
Prescription GHB (Xyrem) for narcolepsy is verified through the Medical Review Officer like any controlled medication.
How GHB is tested
Not on standard employment panels. A dedicated GC-MS/LC-MS assay is required; urine is typically screened around 10 µg/mL. Screening immunoassays are presumptive — a non-negative screen is confirmed by GC-MS or LC-MS/MS at a lower cutoff before it is reported as positive. It is not part of the standard 5-, 10- or 12-panel or DOT tests.
Legal status
Schedule I as an illicit substance; Schedule III when prescribed (Xyrem) for narcolepsy.
Frequently asked questions
How long does ghb stay in your system?
In urine, typical detection is up to about 12 hours (sometimes 24). Hair can detect use for up to 90 days and saliva/blood windows are usually shorter.
Will ghb show up on a standard drug test?
No — GHB is not part of the standard 5-, 10- or 12-panel or DOT tests. It would require a specialised or expanded assay.
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. “GHB Detection Time.” https://drugpanels.com/detection/ghb/. Accessed 2026-09-10.
Sources
- Peer-reviewed literature (PubMed) — U.S. National Library of Medicine — pubmed.ncbi.nlm.nih.gov
- SAMHSA drug testing resources and analyte specifications — Substance Abuse and Mental Health Services Administration — samhsa.gov
Detection windows describe typical ranges from the published literature and assay documentation; individual results vary. See our methodology.