Tag: History of Drug Testing

Ask the Experts

Ask the experts: The history of drug testing

June 4, 2014 By

Over the past 25 years, drug test positivity rates have continually declined among employers with a drug testing program in place.

News

Celebrating 25 years of the Drug Testing Index

October 1, 2013 By

Quest Diagnostics celebrates 25 years of the Drug Testing Index™ and proudly shares this anniversary timeline, highlighting drug testing milestones.