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Drug recovery and stability in an oral fluid drug test specimen can vary depending upon the collection device and the buffer preservative solution. It is important because it impacts the interpretation of results and the reproducibility of testing. Data published in the Journal of Analytical Toxicology showed that Oral-Eze provides consistent, reproducible drug recovery and stability of delta-9-tetrahydrocannabinol (THC), the psychoactive chemical of marijuana, when compared to other oral fluid testing devices.