Essential Guide to Drug Testing Laws webinar

Understanding state laws, substance abuse policies, legal trends, and workplace drug testing

The Life of a Drug Test webinar

From collection to result, Quest experts detail the journey of a specimen through our laboratories.

International drug testing case study

Helping to simplify the challenges of international drug testing

Marijuana detection using oral fluid drug testing white paper

New technology has proven effective in detecting recent drug use, especially in marijuana

Brazil hair drug testing case study

Read why Brazil enacted a mandatory hair test for professional drivers

Latest Quest Diagnostics Drug Testing Indexâ„¢ insights

Increases in illicit drugs drive workforce drug positivity to highest rate in 12 years