GHB has a short detection window. In blood it is usually measurable for about 6 to 8 hours and in urine for about 12 hours, sometimes up to a day. That short window makes the timing of a test important.
How long is GHB detectable?
Because GHB is broken down quickly, the window is much shorter than for many other substances. The times below are guide values.
| Matrix | Approximate window |
|---|---|
| Blood | ± 6 to 8 hours |
| Urine | ± 12 hours, sometimes up to ± 1 day |
| Saliva | a few hours |
Why does timing matter so much?
Because GHB is largely broken down within hours, a test taken too late may show nothing. GHB is part of our extended 10-panel; you can have the GHB value measured there. The broader overview is at how long drugs stay detectable.
Every test result at Zuivertest includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
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