How long weed stays in your system depends on the type of drug test being used and how frequently you use cannabis.

THC detection times vary by test type, lasting up to 12 hours in blood, 24-48 hours in saliva, up to 30 days in urine (on the longer side with frequent use), and up to 90 days in hair. How long THC ...

This initiative addresses the increasing danger from new drug combinations and synthetic substances causing overdoses.

The DOT's proposed rule would add fentanyl and norfentanyl to mandatory drug testing panels for transportation workers under ...