Ohio Marijuana/THC OVIs

Changes in Ohio marijuana use laws have not been matched by updates to OVI laws.

Understanding the nuances of marijuana OVI's becomes crucial for anyone who uses marijuana and drives in Ohio.

Marijuana and Driving

While both medical and recreational marijuana are now legal in Ohio, the state's DUI/OVI laws have not changed. Even though marijuana use is legal, individuals can still be charged with an OVI if (a) a police officer suspects impairment or (b) a drug test indicates they exceed the legal THC limit.

It's important to note that drug tests typically measure THC metabolites, which can linger in a person's system for weeks after use. These metabolites do not necessarily reflect whether the individual is impaired or experiencing effects from marijuana at the time of driving. Additionally, if a person refuses a chemical test, the Ohio Bureau of Motor Vehicles will impose a one-year license suspension, with no driving privileges for at least thirty days.

Drug OVI charges can be contested and won. To effectively challenge these charges, it is essential to hire an attorney who focuses on OVI law, particularly drug-related cases, and who can identify weaknesses in the state's argument.

Per Se Marijuana OVI’s

While you may not feel impaired from marijuana, you can still be charged with an OVI if you test over the state's limit for THC (tetrahydrocannabinol). Ohio recognizes these as per se OVIs. A per se OVI occurs when a person is operating a vehicle, the police have probable cause to arrest for an OVI, and a chemical test (by blood or urine) shows a THC concentration over the legal limit. The concern is the gap between the standards: to arrest you and require that test, an officer needs only probable cause to believe you were impaired, which is a much lower standard than the proof beyond a reasonable doubt required to convict. Once the test comes back over the per se limit, the state can obtain a conviction without ever having to prove that you were actually impaired.

Another issue is that a drug test for marijuana may detect either THC itself or a THC metabolite. While THC is not detectable for a lengthy time after consumption, a THC metabolite may be present in blood samples for days and in urine samples for weeks. Metabolites are byproducts of marijuana that have been broken down in the person’s system. The metabolite most commonly tested for is THC-COOH, known as Carboxy THC, which may remain in a person’s system for weeks after use.

The result is this: A person may have legally used medical marijuana a week or more before driving, but if the police can demonstrate that they had a valid reason to initiate a traffic stop and probable cause to believe the person was impaired, a drug test might only show that the person had used marijuana in the past weeks. Consequently, the person might still be convicted of an OVI. An experienced OVI attorney is essential to challenge the stop, the arrest, and the drug test to protect against this.

Revised Code Sections 4511.19(A)(1)(j)(vii) and (viii) establish the per se limits for marijuana. There are limits for marijuana alone, marijuana metabolites alone, and marijuana metabolites if the person is also under the influence of alcohol or a drug of abuse. These limits vary depending on whether they are detected in a blood test or a urine test.

Ohio OVI THC Levels

Urine Test

Blood Test

Marijuana

Marijuana Metabolite

Marijuana Metabolite and Under the Influence

≥ 10 ng

≥ 35 ng

≥ 50 ng

≥ 15 ng

≥ 5 ng

≥ 2 ng

Medical Marijuana

Ohio law offers specific defenses to per se drug charges for individuals using drugs in accordance with a valid prescription. However, these defenses do not extend to those who use medical marijuana, as medical marijuana cards are not recognized as valid prescriptions. Consequently, the legal use of medical marijuana does not serve as a defense against OVI charges. This limitation remains in effect despite the legalization of recreational marijuana.

Indicators of Marijuana Impairment

To support their case and to justify their decision to arrest and test, police may report observing any of the following:

Mood changes

Sedation

Drowsiness

Alterations in thought process

Impaired memory

Lack of concentration

Altered time and distance perception

Disoriented

An admission of marijuana use

Euphoria

Rebound Dilation

Dilated pupils

Elevated Blood Pressure

Elevated pulse

Finger to Nose (FTN) Test Results

One Leg Stand Test Results

Walk and Turn Test Results

Modified Romberg Balance (MRB) Test Results

Lack of Convergence (LOC) Test Results

Eyelid tremors

Green coating on the tongue

Red, bloodshot eyes

Marijuana debris in the mouth

Odor of Marijuana

Relaxed inhibitions

Body tremors

The presence of marijuana or paraphernalia

Challenging a Marijuana OVI

An experienced OVI attorney can defend against marijuana OVIs.  These defenses typically focus on:

  1. Whether the police officer had a valid reason to stop the vehicle.
  2. Whether the police officer had a reasonable suspicion to expand the scope of the traffic stop to investigate an OVI.
  3. Whether the police officer had probable cause to arrest the person.
  4. Whether the police officer complied with the statutory requirements for drug testing.
  5. Whether the drug test itself was conducted properly.

The evolving laws surrounding marijuana raise important questions about existing case law related to reasonable suspicion for expanding the scope of stops, searches, and probable cause for arrests. Previously, marijuana was illegal in all circumstances, which allowed police greater discretion. However, with its legalization in many contexts, law enforcement may now face increased scrutiny.

We understand how to question the observation of clues, assess their significance, identify unobserved clues, and demonstrate that the police lacked reasonable suspicion to extend the traffic stop and probable cause for arrest. Having completed the "Chromatography - Forensic Analysis for Legal Professionals" course and operated gas chromatographs ourselves, we know how to effectively review and challenge blood, breath, and urine test results by examining the actual scientific processes and potential errors in the chemical analysis.

If you have been charged with a drug OVI, contact us today for a free consultation to evaluate your case and protect your rights before they are lost.

Frequently Asked Questions: Ohio Marijuana / THC OVIs

Can I get a marijuana OVI in Ohio if I do not feel impaired?
Yes. Ohio has per se OVI limits for THC, which means you can be charged if a blood or urine test shows you at or above the legal threshold, whether or not you actually felt impaired while driving. Marijuana use becoming legal did not change this, because the OVI laws were not updated to match.
What are Ohio's THC limits for driving?
Ohio sets per se limits under R.C. 4511.19. For marijuana (THC), the limits are 10 ng in urine and 2 ng in blood. For marijuana metabolite, they are 35 ng in urine and 50 ng in blood. When a marijuana metabolite is combined with alcohol or another drug of abuse, the limits drop to 15 ng in urine and 5 ng in blood. A result at or above a limit can support a charge.
Does a medical marijuana card protect me from an OVI in Ohio?
No. Ohio law provides a defense to certain per se drug charges for people using a drug under a valid prescription, but a medical marijuana card is not treated as a prescription. As a result, lawful medical marijuana use is not a defense to an OVI, and the legalization of recreational marijuana did not change that.
How long does THC stay in your system for an OVI?
It depends on what is measured. Active THC clears relatively quickly, but marijuana metabolites, especially Carboxy-THC (THC-COOH), can remain in blood for days and in urine for weeks. Because a test can detect metabolites long after use, a result may reflect marijuana used days or weeks earlier rather than impairment at the time of driving.
What happens if I refuse a chemical test in a marijuana OVI stop?
Refusing the chemical test triggers a one-year license suspension through the Ohio Bureau of Motor Vehicles, with no driving privileges for at least the first thirty days. Whether to take or refuse a test carries consequences either way, so it is worth understanding both before you are in that situation.
Can a marijuana OVI be challenged?
Yes. Marijuana OVIs can be contested and won. Common defenses examine whether the officer had a lawful reason for the stop, reasonable suspicion to expand it into an OVI investigation, and probable cause to arrest, along with whether the statutory drug-testing requirements were met and whether the test itself was performed correctly. Because marijuana is now legal in many situations, some older assumptions that gave police broad discretion are open to renewed challenge.

Charged with an OVI in Ohio?

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