Screen: Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS), Confirmation: Gas Chromatography/Mass Spectrometry (GC/MS)
Detection of gamma hydroxy butyrate in urine.
Negative (screening threshold 5 mcg/mL).
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
The expected detection period (dose-dependent) is 3 - 10 hours.
Days Test Performed
7 - 9 days
Soft Order Code
Gamma Hydroxybutyric Acid
Date Rape Drug
Drug Screen, Gamma Hydroxy Butyrate
Gamma-Hydroxybutyric Acid (GHB)
Mayo FGHSU (58036) (MedTox 19255)
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Offsite Collection Instructions
Collect random urine specimen and refrigerate.
10 mL urine
1.5 mL urine
If the GHB Screen is non-negative, GHB Confirmation (FGHAC) will be performed at an additional charge. By ordering this test the clinician acknowledges that additional reflex testing will be performed and billed at a separate additional charge if indicated. Test sent to Mayo Medical Laboratories; performed by MedTox Laboratories.