About GHB/GBL

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If you take GHB/GBL, will it show up on a drug test?

GHB and GBL are usually tested for using hair, urine, saliva (spit) or blood. However, these drugs may not be tested for often as they can only be picked up on in a very short window (1–2 days) and can be unreliable.

GHB and GBL testing windows can change depending on how much you have taken, how often and your individual body. However, it is thought that GHB and GBL can be found for 12 hours in urine and 8 hours in blood – these are the most accurate tests. Saliva tests detect GHB and GBL for up to 6 hours but are mostly used as a secondary test after a urine sample. Hair sample tests can detect GHB and GBL for up to 30 days, but they are not very reliable.

If you believe you have been given GHB or GBL without your consent (sometimes called getting ‘roofied’), you may be asked to have a test to see if it is in your system. If you have been given these drugs without your knowing and are expecting a drug test for work or court, you can speak to a medical professional or Police about your next steps.

At some time in your life, an employer, a family member or the government may ask you to take a drug test. It’s important to understand what drug tests can detect and what might happen if you fail one.

If you fail a drug test, this may affect your employment, government support, court cases or official licences or registrations. At work, you may face legal consequences, especially if you have put the safety of others at risk.

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