No. The urine you provide for a drug test must come directly from your bladder. Taking it from the toilet will dilute it, and the lab will know that, and you will automatically be considered to test positive.
for drug testing?
DNA drug testing doesn't exist.
No just urine testing.
They do Hair 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.