Oklahoma Marijuana DUI Laws Target Sober Medical Patients
Is Oklahoma Turning Legal Medical Marijuana Patients into Criminals?
Legal to Use, But Not Legal to Drive. Even When 100% Sober.
Oklahoma legalized medical marijuana in 2018. But since then, the state has changed its laws in ways that make it easier to charge medical marijuana patients with DUI, even when they are not high or impaired.
2018 | Oklahoma Legalized Medical Marijuana
Oklahoma made it legal for people with a medical marijuana card to use marijuana for medical reasons.
2025 | Oklahoma Made Marijuana DUI Charges Easier
Oklahoma removed a rule requiring blood tests to be taken within two hours in certain drug DUI cases.
This made it easier for prosecutors to use blood tests showing marijuana in someone’s system, even though marijuana can remain detectable long after its effects have worn off.
November 2026 | Oklahoma Made It Even Easier to Face a Marijuana DUI
Oklahoma moved THC, the main ingredient in marijuana that causes a high, into its most restricted drug category, known as Schedule I.
Why does that matter?
Oklahoma has a DUI law that can apply when a driver has even tiny amounts of certain illegal drugs, or the substances left behind after the body breaks them down, in their system.
By moving THC into this category, Oklahoma made it possible for medical marijuana patients to face DUI charges simply because marijuana is still detectable in their bodies, even when they are completely sober.
The Bottom Line
Oklahoma tells medical marijuana patients they can legally use marijuana. But the state has also changed its laws in ways that could allow those same patients to be arrested and prosecuted for DUI days after using it, even without evidence that they were impaired.
It’s a contradiction that raises serious questions about fairness and trust in government.