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A Guide to Marijuana DWI in NC

marijuana dwi in nc

Driving while impaired doesn’t just apply to alcohol. Under North Carolina law, it is illegal to drive while under the influence of marijuana or another impairing substance.

A marijuana DWI charge is a serious offense with lasting, serious consequences. At the Law Offices of J.M. Kotzker, our experienced DWI defense attorneys in Raleigh help individuals facing these complex drug impairment charges understand their rights and options under North Carolina DWI laws.

What Is a Marijuana DWI?

A marijuana DWI occurs when a driver operates a motor vehicle while their mental or physical faculties are impaired due to marijuana use. This can result from recent consumption or lingering marijuana intoxication that affects one’s ability to drive safely.

Unlike alcohol related DWI, there is no specific legal limit or reliable test to measure marijuana impairment, making these cases more complicated to prosecute—and to defend.

Under North Carolina General Statutes (N.C.G.S.) § 20-138.1, a person commits a DWI in North Carolina if they operate a vehicle under the influence of an impairing substance, including marijuana or other controlled substances.

Important points to know:

  • THC Legality: Marijuana remains illegal in North Carolina for both medical and recreational use as of 2025.
  • Zero Tolerance Policy: There is no legal threshold for THC in a person’s system, so any level of appreciable impairment may lead to a marijuana DWI charge.
  • Appreciable Impairment: Prosecutors must prove impairment—not merely that marijuana was present in the body.
  • Controlled Substance Classification: Marijuana in North Carolina remains a controlled substance, even though medical marijuana legislation has been proposed.
nc marijuana dwi

How Police Determine Marijuana Impairment

Proving a marijuana DWI in NC is far more challenging than proving drunk driving. There is no breath test that can instantly show intoxication, so police officers rely on behavioral observation, physical cues, and chemical testing.

Standardized Field Sobriety Tests

Standardized field sobriety tests (SFSTs) are often used at roadside stops to determine impairment. These may include walking in a straight line or following a light with your eyes.

However, these field sobriety tests are subjective. Marijuana affects individuals differently, meaning results may not accurately reflect true marijuana impairment. An experienced DWI attorney can often challenge their reliability in court.

Blood and Urine Testing

If a police officer suspects marijuana use, they may order a blood test or urine test to detect THC or its metabolites, which is different from a portable breath test taken for alcohol:

  • A blood concentration of THC can indicate prior marijuana use but not necessarily impairment at the time of driving.
  • Urine tests may detect THC days or weeks after consumption, making them unreliable for proving marijuana DWI charges.

    • To test positive does not mean you were impaired—these tests can be successfully challenged.

    Penalties for a Marijuana DWI in North Carolina

    Penalties for a DWI drug charges, including marijuana DWI offenses, are the same as for alcohol-related DWIs under state law. Depending on aggravating factors, prior offenses, or prior convictions, sentences may range from community service to jail time and long-term license suspension.

    First-Time Offender Penalties

    A first-time marijuana DWI charge carries:

    • License Suspension: A one-year suspension of your driver’s license and potential administrative driver’s license penalty.
    • Fines: Up to $1,000 depending on the level of the DWI.
    • Jail Sentence: Between 24 hours and 60 days; however, community service can sometimes reduce the penalty.
    • Substance Abuse Assessment: A required substance abuse assessment and completion of any recommended program.
    • Insurance Increases: Significant rate hikes following a marijuana DWI conviction.

    However, these field sobriety tests are subjective. Marijuana affects individuals differently, meaning results may not accurately reflect true marijuana impairment. An experienced DWI attorney can often challenge their reliability in court.

    Repeat Offenses and Harsher Penalties

    Prior DWI convictions, such as a second or third DWI offense, comes with even harsher penalties, including longer license suspensions, higher fines, and extended jail time. A fourth DWI or a felony DWI charge can result in a jail sentence of several years and permanent revocation of driving privileges.

  • A blood concentration of THC can indicate prior marijuana use but not necessarily impairment at the time of driving.
  • Urine tests may detect THC days or weeks after consumption, making them unreliable for proving marijuana DWI charges.

    • To test positive does not mean you were impaired—these tests can be successfully challenged.

    Understanding Aggravating Factors

    Certain aggravating factors can increase penalties for a marijuana related DWI, such as:

    • A minor present in the vehicle
    • Excessive speeding or reckless driving
    • A high level of appreciable impairment
    • Prior drug or alcohol DWI convictions
    • Driving with a revoked driver’s license

    These may result in longer jail sentences, increased fines, and a criminal record that affects future employment or federal student loans eligibility.

    Defending Against Marijuana DWI Charges

    A strong defense is essential when facing a marijuana DWI case. Because there’s no objective THC threshold to prove impairment, many cases rely on officer testimony and testing methods that can be disputed.

    marijuana DWI in north carolina

    Common Defense Strategies

    • Challenging the legality of the stop: Was there reasonable suspicion for the traffic stop?
    • Questioning the validity of field tests: Were standardized field sobriety tests administered correctly?
    • Disputing chemical results: Were blood tests or urine tests properly conducted and interpreted?
    • Demonstrating alternative explanations: Fatigue, medical conditions, or anxiety can mimic physical signs of impairment.

    A skilled traffic offense attorney can expose flaws in the state’s case and highlight inconsistencies in police officer procedures to seek reduced or dismissed charges.

    What To Do If You’re Charged with a Marijuana DWI in North Carolina

    If you are arrested for a marijuana DWI charge, stay calm and take the following steps:

    • Do not admit drug use. Anything said can be used against you in court.
    • Request legal representation. Contact a DWI attorney immediately to protect your rights.
    • Comply respectfully. Follow instructions but avoid self-incrimination.
    • Prepare for the legal process. Work with your attorney on your defense, including a substance abuse assessment if required.

    Facing a marijuana DWI in North Carolina can be overwhelming, but an attorney experienced in marijuana DWI charges can guide you through the process and pursue the best outcome.

    NC Marijuana DWI Laws FAQs

    As of 2025, marijuana remains illegal for both recreational and medical use in North Carolina. While legalization discussions continue, driving while impaired by any controlled substance will still be prosecuted under current DWI laws.

    A first-time offender may face jail time between 24 hours and 60 days, though judges often allow community service or probation instead, depending on the marijuana DWI charge and mitigating factors.

    Possessing less than half an ounce of marijuana is a misdemeanor DWI-related criminal offense, typically punishable by a fine. However, possession during a marijuana DWI stop may increase the severity of the criminal charge.

    Common aggravating factors include a prior conviction, driving with a suspended driver’s license, reckless operation of a motor vehicle, or having a child under 18 in the car. These can trigger harsher penalties and longer jail sentences.

    Yes. Under North Carolina law, you can be charged with a DWI if you operate a vehicle while under the influence of any impairing substance, including marijuana or other controlled substances—even without a measurable blood alcohol concentration.

    Contact Our Raleigh Marijuana DWI Lawyers

    A marijuana DWI charge is a serious offense that can impact your driving record, employment, and reputation. At the Law Offices of J.M. Kotzker, we provide aggressive defense for clients facing marijuana DWI charges in Raleigh and throughout North Carolina.

    If you’re facing a marijuana DWI charge or have been accused of driving under the influence of a controlled substance, contact us today to discuss your case and options by calling  919-439-5104 or filling out our contact form to schedule a FREE consultation.

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