How do I pass a drug test for parole?

It depends on multiple factors as weight, height, metabolism. What drug do you use and how often? I can give you the list with approximate detection times:

Single Use

Blood Test: 2-3 days

Saliva Test: 12-24 hours

Urine Test: 2-3 days

Hair Test: Up to 90 days

· Habitual

Blood Test: 2 weeks

Saliva Test: 12-24 hours

Urine Test: Up to 12 weeks

Hair Test: Up to 90 days

You can try with drinking more water, exercising, taking daily vitamin b-12, but remember this will not clean your body. It will just fasten the process.