While Texas residents may be accustomed to drug testing for jobs, the increasing access to marijuana across the country may increase the need for roadside testing of marijuana intoxication. Various methods have been evaluated, but there has not been much success in finding an efficient and minimally invasive solution. However, a method being developed by a Stanford University team takes only a few minutes to identify the amount of THC in the system through the collection of a saliva sample.
It is important to substantiate suspected DWI charges with objective evidence such as a chemical test. With alcohol, breath testing is a common standard. Saliva testing offers a comparable option as it only requires a small amount of time and can be completed at the scene. The sample is exposed to THC antibodies, and when these antibodies are activated, they provide a positive indication of the presence of the substance. Further, the number of antibodies acting upon THC can be computed to provide a numerical value for intoxication levels.