How to Pass a Mouth Swab Drug Test ? - Passing a mouth swab drug test can be challenging, as these tests are designed to detect recent drug use. However, there are a few strategies that may increase the chances of passing. First, it's important to refrain from drug use well in advance of the test. Oral hygiene practices like brushing your teeth, using mouthwash, and thoroughly rinsing your mouth with water can help remove any residual traces of drugs. In addition, some commercial products claim to mask drug metabolites, but their effectiveness varies and may not guarantee a negative result. It's essential to remember that attempting to cheat on a drug test is generally not admissible, and consequences for getting caught can be severe.