Best Ways to Pass a Drug Test: How to Pass Any Drug Test (Ultimate Guide) If you're in the process of applying for jobs, you may be wondering how to pass a drug test. With recreational marijuana use becoming legal in several states, many people worry about drug detection affecting their employment. If you have an upcoming drug test, that means you'll need to provide a urine, hair, or blood sample to a medical laboratory. While it's not recommended that you provide false samples to a lab, there are some ways to clear your body of marijuana and other toxins.