The Department of Transportation has approved oral fluid (saliva) drug testing as an alternative to urine. Here is what drivers and carriers should know.
How Oral Fluid Testing Works
A collector swabs the inside of the donor's mouth to gather a saliva sample, which is then sent to a certified lab. Because the collection is observed directly, it is harder to tamper with than a urine specimen.
Oral Fluid vs Urine
- Oral fluid detects very recent use well; urine detects a longer window
- Oral fluid collection is directly observed, reducing cheating
- Both must go through a certified lab and MRO review
Many programs use urine as the standard and keep oral fluid as an option, especially where observed collection is a concern.
What It Means for You
Oral fluid gives employers another compliant tool, particularly useful for reasonable-suspicion situations where recent use is the concern.
Frequently Asked Questions
Is oral fluid testing DOT-approved? Yes, DOT has authorized oral fluid testing as an alternative method alongside urine, performed at certified labs.
Is saliva testing as accurate as urine? Both are lab-confirmed and MRO-reviewed. They differ mainly in detection window, not in reliability.
Can Test Pro do oral fluid collections? Contact us about which collection methods are available for your program and location.
Let Test Pro Handle It
Test Pro LLC in Kent, WA helps owner-operators, motor carriers and employers stay compliant across Washington and beyond — drug and alcohol testing, random pools, IFTA, filings and driver files. Call (206) 518-2097 or book an appointment. Questions first? Contact us.