They do Hair testing.
for drug testing?
DNA drug testing doesn't exist.
No just urine testing.
urine
Testing a person for (if under suspicion) drug levels in the bloodstream or urine. Usually at sports events.
random urine drug testing, and saliva testing for hire and accident.
Hair and urine testing
No, not for a urine test.
YES
They use a standard urine test.
Urine, saliva, and some blood test kits for home/work use Gas-Chromography will test hair, blood, urine, saliva. There are reaction agents that change color depending on if they detect a drug or not. Spectral analysis of the light from a burned sample.
Can trazadone give a false positive urine drug screen for methamphetamine