If the interval between use and testing is long and the elimination half-life is long, urinalysis can sometimes produce a positive result where oral fluid testing would not.

Question

Quizplus · Accepted Answer

Urinalysis can detect drugs in the system for a longer period of time compared to oral fluid testing due to the longer elimination half-life of certain drugs. Therefore, if there is a long interval between drug use and testing, urinalysis can produce a positive result even if oral fluid testing would not.

If the Interval Between Use and Testing Is Long and the Elimination