A visual guide used in conjunction with certain rapid drug screening devices serves as a reference for interpreting test results. These devices, often shaped like a cup (“t-cup”), contain chemical reagents that react with drug metabolites present in a urine sample. The resulting color change is compared against the reference to determine whether a particular drug is present and, potentially, its approximate concentration.
The availability of such a visual aid offers a convenient and immediate means of preliminary drug screening. Its ease of use allows for on-site testing in various settings, including workplaces, schools, and clinics. Historically, such testing required sending samples to a laboratory, delaying results and increasing costs. These resources significantly expedite the initial screening process, enabling quicker decisions regarding further confirmatory testing or intervention.