The Department of Transportation (DOT) is proposing a new rule to update its drug testing guidelines, revising terminology ...

Medically reviewed by Mary Choy, PharmD Key Takeaways 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 ...

Many states in the U.S. have legalized cannabis either medically or recreationally, but without legalization at the federal level regulation is left to states, including testing for contaminants ...