Many of these folks are primarily concerned with marijuana and it's noted ability to stay in the system for long and unpredictable periods of time. So they want to test themselves at home prior to going into the lab. To be clear, passing a home drug test does not guarantee the same results as a lab drug test.
Can you get an over the counter drug test?
You can buy home drug testing kits at pharmacies or through the Internet. But home test kits also may give false or deceptive results. Accurate or not, the test can create hard feelings.11 feb 2021