drug tests

In this April 12, 2018, photo, a marijuana plant awaits transplanting at the Hollingsworth Cannabis Company near Shelton, Wash. Thirty states have legalized some form of medical marijuana, according to a national advocacy group. Nine of those states and Washington, D.C., also have broad legalization where adults 21 and older can use pot for any reason. Ted S. Warren/AP hide caption

Urine testing to diagnose illness or to detect the presence of drugs is generally routine. But a woman who gave her doctor a urine sample months after back surgery got socked with a huge bill. SPL/Science Source hide caption

A Krispy Kreme doughnut was to blame for a white substance that led to an Orlando man being jailed on drug charges. Results from roadside drug test kits conducted by law enforcement officers can be unreliable. Joe Raedle/Getty Images hide caption