From someone who was legitimately drugged and raped, thanks.

GHB leaves your system pretty quickly. You’d have to get tested within 12 hours of it being ingested, and given the low rates of reporting rape…

Edit to add: https://americanaddictioncenters.org/ghb-abused/how-long-in-system

> Most standard drug tests do not test for the presence of GHB in your system, and few people test positive for GHB, even when they have used it. Nonetheless, urine, blood, saliva, and hair tests have been developed to test for GHB. The below are detection times by body system:

>Urine tests are noninvasive and relatively affordable ways to test for GHB use. The detection window is short, however, only being able to detect a small amount of GHB in urine up to 12 hours after last use.

>Blood tests, while invasive, are the most common way to test for GHB use because they are highly accurate. Blood tests will only detect GHB use for up to eight hours after last use.

>Saliva tests are often used as a secondary test to confirm the accuracy of a urine test. Inexpensive and noninvasive, saliva tests are convenient ways to confirm GHB use for up to six hours after last use.

>Hair tests are less accurate than the other forms of drug testing for GHB, but they offer a much longer detection window of up to one month. Hair tests can be useful for testing victims of GHB-aided sexual assault who were unable to get one of the previous forms of drug tests conducted in time.

>In general, GHB is difficult to detect on drug tests because of the short detection windows and lack of accuracy of it showing up on each type test. In situations of overdose, medical professionals are often unaware that GHB has been ingested and don’t even think to test for it, as the use of other drugs that were also consumed, such as alcohol, is usually more obvious.