Marijuana DUI in Oklahoma: What the Law Says Now

New Horizons Legal, PLLC | Tulsa, Oklahoma | Last updated: April 2026

If you have a medical marijuana card, use cannabis legally, or used marijuana days earlier, an Oklahoma cannabis DUI charge is still possible. But the key detail in April 2026 is this: Oklahoma's marijuana DUI law changed on November 1, 2025, then changed again on January 1, 2026.

That timeline matters. A person arrested in November or December 2025 may be dealing with a different statutory version than a person arrested today.

Oklahoma's Marijuana DUI Law: The Basics

Oklahoma prosecutes marijuana DUI under 47 O.S. § 11-902, the same general DUI statute used for alcohol and other intoxicants.

For marijuana-related cases, prosecutors may proceed in at least two different ways:

• Under the per se Schedule I / metabolite subsection in 47 O.S. § 11-902(A)(3)
• Under an actual impairment theory in 47 O.S. § 11-902(A)(4)

As the statute is currently codified in April 2026, subsection (A)(3) applies when a person drives or is in actual physical control of a motor vehicle with any amount of a Schedule I chemical or controlled substance, or one of its metabolites or analogs, in the person's blood, saliva, urine, or other bodily fluid within two hours after arrest.

That is why a marijuana DUI Oklahoma case is different from a simple "were you visibly high?" question. The state may rely on chemical-test evidence, not just driving behavior.

Does a Medical Marijuana Card Protect You?

No.

The statute is explicit on this point. 47 O.S. § 11-902(B) states that being lawfully entitled to use a controlled substance is not a defense to DUI. In plain terms, an OMMA patient card does not automatically protect you from a DUI marijuana medical card Oklahoma charge.

What SB 54 Changed on November 1, 2025

SB 54 was a major rewrite of Oklahoma's DUI statute. For marijuana and other drug-based DUI cases, two parts of that law matter most.

1. SB 54 temporarily removed the two-hour testing language

The version of 47 O.S. § 11-902 that took effect on November 1, 2025 removed the old "within two hours" wording from the per se subsections.

That change created immediate concern in marijuana cases because THC-related evidence can raise timing questions that are very different from alcohol cases.

2. SB 54 broadened aggravated DUI and made it a felony offense

SB 54 also expanded Oklahoma's aggravated DUI framework. Under the statute, a DUI can become aggravated DUI when it is paired with certain listed circumstances, including:

• A collision that caused damage or injury
• Eluding law enforcement
• Driving at least 20 mph over the speed limit
• Having a passenger under 18 in the vehicle
• Reckless driving
• Certain additional traffic violations listed in the statute

That change matters for marijuana DUI Oklahoma prosecutions because aggravated DUI is not limited to high alcohol BAC cases anymore. A marijuana-based DUI allegation can also be charged as aggravated DUI if one of the statutory aggravators is present.

What Changed Again on January 1, 2026

The current codified version of 47 O.S. § 11-902, effective January 1, 2026, restored the two-hour testing language for the per se subsections.

So, as of April 7, 2026, the law now on the books is different from the short-lived version that existed from November 1, 2025 through December 31, 2025.

That means:

• If you were arrested today, the current statute again uses the two-hour wording for the per se Schedule I / metabolite subsection.
• If you were arrested during November or December 2025, your lawyer should closely examine which version of the statute applies to your case.

HB 3018: Proposed Marijuana-Specific Fix, Not Current Law

HB 3018 was introduced in the 2026 session as a marijuana-focused revision to the DUI statute. As of April 7, 2026, it has not been enacted.

The bill proposes an exception for marijuana, marijuana derivatives, and synthetic cannabinoids from the per se subsection in 47 O.S. § 11-902(A)(3).

That proposal matters because it shows lawmakers are actively debating how Oklahoma should handle marijuana DUI cases, especially where chemical testing may show prior use without resolving the harder question of actual impairment at the time of driving.

New Open-Container Rule for Marijuana in Vehicles

Separate from the main DUI statute, SB 786 created new marijuana-in-vehicle restrictions effective November 1, 2025.

Under that law, a person operating a motor vehicle on a public highway, street, or alley may not:

• Consume marijuana while operating the vehicle
• Inhale secondhand marijuana smoke while operating the vehicle
• Possess an open marijuana container in the passenger area of the vehicle

This is separate from a DUI charge, but it creates another source of criminal exposure in traffic-stop cases involving cannabis.

Current Penalties for Marijuana DUI in Oklahoma

Marijuana DUI generally follows the same penalty structure as other DUI cases under 47 O.S. § 11-902.

Charge	Exposure
First DUI offense	Misdemeanor; 10 days to 1 year in county jail and up to a $1,000 fine
Second DUI offense within 10 years	Felony; 1 to 5 years in DOC and up to a $2,500 fine
Later felony DUI cases	Penalties can increase substantially depending on the defendant's prior record
Aggravated DUI	Felony treatment with mandatory incarceration provisions under the current statute

The aggravating-factor analysis is especially important in Oklahoma cannabis DUI cases because the difference between a basic DUI filing and an aggravated felony filing can be enormous.

Why These Cases Can Still Be Defensible

A marijuana DUI charge is not the same as an automatic conviction. These cases often turn on specific legal and evidentiary issues, including:

• Whether the stop itself was lawful
• Which version of the statute applies based on the arrest date
• Whether the chemical testing fits the timing language in the applicable statute
• Whether the state can prove actual impairment if it is not relying on the per se subsection
• Whether the alleged aggravating factor is actually supported by the evidence
• Whether collection, handling, and chain of custody problems affect the reliability of the test

What to Do If You Are Charged

If you are arrested for marijuana DUI in Oklahoma:

• Do not guess about what version of the law applies to your case
• Act quickly to preserve body-cam, dash-cam, and testing records
• Get legal advice early, especially if the arrest happened during the November 1, 2025 to December 31, 2025 transition period or involves an aggravated DUI allegation

Charged With a Marijuana DUI in Oklahoma?

If you are facing a marijuana DUI Oklahoma charge, a medical marijuana DUI question, or an Oklahoma cannabis DUI allegation tied to an OMMA card, early case review matters.

New Horizons Legal represents clients in Tulsa and surrounding Oklahoma courts. To discuss your situation, call (918) 221-9438, visit our booking page, or learn more about our Tulsa DUI defense attorney services.

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This post is for general information only and does not create an attorney-client relationship. Oklahoma criminal law changes quickly, and the outcome of any DUI marijuana medical card Oklahoma case depends on the facts, timing, and evidence involved. This post reflects the law as reviewed on April 7, 2026.