YES
Testing a person for (if under suspicion) drug levels in the bloodstream or urine. Usually at sports events.
Usually. It can also be done by testing hair follicles, and cotton swabs in your mouth. Standard drug tests for marijuana are usually urine tests.
for drug testing?
DNA drug testing doesn't exist.
No just urine testing.
They do Hair testing.
Almost no drug is detectable in urine 3 months after last use, this usually requires testing of hair.
urine
Hair and urine testing
random urine drug testing, and saliva testing for hire and accident.
No, not for a urine test.
They use a standard urine test.