The color bands indicate that either no drugs are present or that one or more of the five drugs may possibly be present. The results are available in three days by calling a help line and providing a special identification number. Some drugs can be detected in urine within two hours of use and remain detectable for several days or more, depending on how much was used, how it was taken, the user's age and weight and other factors. Other drugs have different timing for detection in urine. Marijuana is not detectable until six to 18 hours after use, but remains detectable for up to 28 days.
Numerous factors can affect test results.
Not every positive result means that illegal drugs have been used. For example, certain foods and medicine may cause a positive test result. Someone can also test positive for marijuana if they repeatedly have been around heavy marijuana smoke even though they have not smoked marijuana themselves. Likewise, not every negative results means that illegal drugs were not used. Someone who tests negative could also be using an illegal drug not tested with the QuickScreen kit.