Oral swab is accurate if you just used. Other than that, it can only detect most drugs for 24 hours. Meth/amphetamines can be detected up to 72 hours. Urine & blood tests are much more accurate.
How Effective Are Oral Swab Drug Tests?
^^^ probably not my buddy smoked a blunt a couple hours before, brushed, mouthwashed, and passed
Would a person fail an oral drug test for marijuana if the marijuana was last used within 10 hrs of being tested?
Not accurate I do not think I have passed all mine