What Does a DOT Drug Test Screen For?
A DOT drug test checks for a set list of drugs written into federal rules. Employers cannot add to it. This guide covers what is on the panel as of September 2026, where the fentanyl proposal stands, and whether oral fluid tests can be used yet.
Updated September 28, 2026 · Checked against the federal regulations
The five drug classes
Under 49 CFR 40.82, labs must test DOT specimens for five drugs or classes of drugs, and must not test DOT specimens for any other drugs:
- Marijuana metabolites.
- Cocaine metabolites.
- Amphetamines.
- Opioids.
- Phencyclidine (PCP).
What each class includes
The cutoff table in 40.85 lists the specific substances labs look for in urine. Results below the cutoff are reported as negative. A result at or above the initial cutoff gets a confirmation test.
- Marijuana: THCA (initial cutoff 50 ng/mL, confirmation 15 ng/mL).
- Cocaine: benzoylecgonine (initial 150 ng/mL, confirmation 100 ng/mL).
- Opioids: codeine, morphine, hydrocodone, hydromorphone, oxycodone, oxymorphone, and 6-acetylmorphine.
- Amphetamines: amphetamine, methamphetamine, MDMA, and MDA.
- Phencyclidine (PCP): initial and confirmation cutoff 25 ng/mL.
Is fentanyl on the DOT panel?
Not yet. As of the eCFR text current through September 24, 2026, fentanyl is not in 40.82 or the 40.85 cutoff table.
On September 2, 2025, DOT published a proposed rule to add fentanyl and its metabolite norfentanyl to its drug testing panels. The comment period closed October 17, 2025. We found no final rule in the Federal Register as of this writing. A proposed rule does not change what labs test for. Only a final rule does.
In the same proposal, DOT noted that HHS decided to keep MDMA and MDA on its testing panels for now.
Urine vs. oral fluid
A 2023 DOT rule added oral fluid (saliva) testing as an option. But an employer can only use it once HHS has certified at least two oral fluid laboratories: one to test the primary specimen and a different one for split specimen testing.
HHS's September 1, 2026 list of certified laboratories says there are no laboratories certified to test oral fluid specimens. So DOT drug tests are still urine tests.
A DOT rule effective June 10, 2026 says that while oral fluid is not yet available, a directly observed urine collection is used in situations where an oral fluid test would otherwise be required. Once HHS certifies a second oral fluid lab, employers get an 18-month grace period to set up oral fluid testing.
DOT alcohol tests are separate. They use breath or saliva testing under the Part 40 alcohol procedures.
About "5-panel" and "10-panel" labels
You will often hear a DOT test called a "5-panel." The rule itself says five drugs or classes of drugs. Each class can include several substances, as the list above shows.
Because labs must not test DOT specimens for other drugs, an employer cannot ask the lab to add drugs to a DOT test. Any wider panel has to be a separate, non-DOT test.
Labs also run validity tests on each urine specimen. They check creatinine and pH and test for oxidizing adulterants (40.87). A verified adulterated or substituted result is treated as a refusal.
Pact Compliance runs random pools and Clearinghouse queries and keeps testing records organized for small fleets.
Common questions
What drugs does a DOT drug test check for?
Five drugs or classes: marijuana metabolites, cocaine metabolites, amphetamines (including methamphetamine, MDMA, and MDA), opioids (codeine, morphine, hydrocodone, hydromorphone, oxycodone, oxymorphone, and 6-acetylmorphine), and PCP (40.82 and 40.85).
Does a DOT drug test check for fentanyl in 2026?
No, not as of the eCFR current through September 24, 2026. DOT proposed adding fentanyl and norfentanyl on September 2, 2025, but a proposal does not change the panel until a final rule takes effect.
Can I use a saliva (oral fluid) test for DOT drug testing?
Not yet. DOT authorized oral fluid testing in 2023, but it requires at least two HHS-certified oral fluid labs. HHS's September 1, 2026 list shows none.
Can I add extra drugs to a DOT test?
No. Under 40.82, labs must not test DOT specimens for any drugs other than the five listed classes.
Does the DOT panel include prescription opioids like oxycodone?
Yes. Oxycodone, oxymorphone, hydrocodone, and hydromorphone are on the 40.85 cutoff table under opioids.
Sources
- 49 CFR 40.82 (eCFR)
- 49 CFR 40.85 (eCFR)
- 49 CFR 40.87 (eCFR)
- 49 CFR 40.67 (eCFR)
- DOT proposed rule: Addition of Fentanyl to DOT drug testing panels (Sept. 2, 2025)
- DOT final rule: Oral fluid testing added to Part 40 (May 2, 2023)
- DOT final rule: Directly observed urine collections while oral fluid is unavailable (May 11, 2026)
- HHS: Current List of HHS-Certified Laboratories (Sept. 1, 2026)