Can You Get a CDL If You Use Marijuana?
No — marijuana is still prohibited for anyone holding a CDL, and the 2026 rescheduling news did not change that. DOT drug-testing rules (49 CFR Part 40) were not amended: a positive marijuana test puts you in "Prohibited" status in the FMCSA Clearinghouse, and neither state-law medical marijuana nor CBD use is an explanation an MRO can accept (§40.151(e)–(f)).
Fast-moving topic. The broader marijuana rescheduling was still awaiting a final rule as of this page's last-verified date — this page states what applied to DOT testing as of that date and should be re-checked more often than the rest of the hub.
| Question | Answer |
|---|---|
| Did the 2026 rescheduling change DOT testing? | No — 49 CFR Part 40 was not amended |
| Is state-law medical marijuana a valid excuse for a positive test? | No — an MRO must not verify a test negative based on a physician's marijuana recommendation (§40.151(e)) |
| Is CBD a valid explanation for a lab-confirmed marijuana positive? | No |
| 2026 random drug-testing rate | 50% — unchanged since 2020 |
| A positive test or refusal | "Prohibited" status — requires the full return-to-duty process |
Why — the full reasoning
As of 2026 there is real regulatory news, and it is being widely misread. A December 18, 2025 executive order (EO 14370) directed the Attorney General to complete the marijuana-rescheduling rulemaking “in the most expeditious manner.” Then, effective April 28, 2026, FDA-approved marijuana drug products and marijuana under state-issued medical marijuana licenses were placed into Schedule III (91 FR 22714) — a narrow action. By the rule's own terms, Schedule I still holds “all unlicensed marijuana crops, bulk marijuana, and any marijuana or marijuana extract that has not yet been incorporated into a FDA-approved drug product” — which is where recreational use sits, since it is neither FDA-approved nor under a medical license. DEA separately held a hearing on the broader question of rescheduling marijuana generally, scheduled for June 29 through no later than July 15, 2026 — and as of July 30, 2026, no final rule on that broader rescheduling had been published.
Here is the part that matters for a CDL: 49 CFR Part 40, the DOT drug-testing regulation, was not amended — the current Part 40 still lists marijuana metabolites among the tested substances (§40.85). DOT’s Office of Drug and Alcohol Policy and Compliance has stated that until the rescheduling process is complete, DOT’s drug testing process and regulations will not change, and its medical-marijuana, recreational-marijuana, and CBD guidance all remain in effect. A state medical-marijuana card is not a valid explanation for a positive test — an MRO must not verify a test negative on a physician’s recommendation of marijuana (§40.151(e)) — and CBD use is not a legitimate medical explanation for a laboratory-confirmed marijuana positive either (§40.151(f)).
This is not a small edge case. Marijuana is by far the largest single substance in Clearinghouse drug positives: the marijuana metabolite (Δ9-THCA) was identified in 34,916 positive tests in 2024 and 32,938 in 2025, out of 57,667 and 50,176 all-substance identifications those years (Clearinghouse December 2025 monthly summary). A positive test or a refusal flips your Clearinghouse status to "Prohibited" and pulls you from driving until you complete the full return-to-duty process.
What to do next
- 1
Do not rely on a medical card or "it's legal in my state"
Federal DOT rules govern your CDL regardless of state law. If you hold or want a CDL, treat marijuana as off-limits — the testing rule has not changed.
- 2
If you're already in Prohibited status, there is a road back
A positive test or refusal is not permanent. The return-to-duty process — a Substance Abuse Professional evaluation, treatment, a negative RTD test, and follow-up testing — restores eligibility. See our guide to losing and regaining your CDL.
- 3
Re-check this one often
This is the fastest-moving topic on the site. The rescheduling process is ongoing; if DOT ever amends Part 40 it will be big news. Until then, nothing has changed for testing.
Written by Travis Stuckert, a 15-year Class A CDL driver. This is educational information, not legal advice — federal rules are administered by the states and your exact situation can differ. Confirm anything that affects your license with your state licensing agency, the primary source linked above, or a qualified professional.