Georgia Cannabis DUI — O.C.G.A. § 40-6-391 & the Love v. State Complication

Last verified: May 2026

The Three Cannabis-DUI Pathways Under § 40-6-391

Georgia’s DUI statute, O.C.G.A. § 40-6-391, contains six paragraphs identifying violations; three apply to cannabis cases:

• § 40-6-391(a)(2) — DUI Less Safe (Drug): Driving "under the influence of any drug to the extent that it is less safe for the person to drive." Requires proof of impairment; the prosecutor must show actual driving impairment.
• § 40-6-391(a)(4) — DUI Combined: Less-safe driving from any combination of alcohol and drugs.
• § 40-6-391(a)(6) — DUI Per Se (Drug): Driving "while there is any amount of marijuana or a controlled substance ... present in the person’s blood or urine ... including the metabolites and derivatives ... without regard to whether or not any alcohol is present."

The Love v. State Complication

The Georgia Supreme Court, in Love v. State, 271 Ga. 398, 517 S.E.2d 53 (1999), struck down (a)(6) as applied to legal users of pharmaceutical marijuana as a violation of the equal-protection clause. The court reasoned that legal users could only be convicted upon a showing of impairment, while illegal users could be convicted on the mere presence of metabolites — a distinction the court found irrational.

In practice, Georgia prosecutors typically charge cannabis DUI cases under (a)(2) "less safe" and use (a)(6) as an alternative theory. The State must therefore prove that the driver was actually rendered less safe to drive — not merely that metabolites were present.

No Numeric Nanogram Threshold

Georgia does not have a numeric nanogram threshold for THC in blood. Unlike Colorado’s 5 ng/mL inference standard or Washington’s 5 ng/mL per-se threshold, Georgia’s framework relies on impairment evidence under (a)(2). A defendant who used cannabis days earlier and is no longer impaired can still face a DUI charge under (a)(2) if the officer’s observations and field-sobriety performance support it; Drug Recognition Expert (DRE) testimony is often pivotal.

Penalty Schedule

The 1-Year Suspension With No Work Permit

One of the cruelest features of Georgia’s drug-DUI framework is that no limited work permit is available on a first drug-DUI conviction, unlike alcohol DUIs where a work permit is typically available after the first 30 days of suspension. A first drug-DUI therefore produces a full 1-year hard license suspension — with no path back to driving for a year, regardless of employment requirements.

For working-class defendants without alternative transportation, the practical effect of the no-work-permit rule is often more punishing than the underlying $300–$1,000 fine.

Implied Consent

Under O.C.G.A. §§ 40-5-55 and 40-5-67.1, Georgia has implied-consent for chemical testing. Refusal to provide blood or urine after arrest results in an automatic 12-month license suspension appealable within 30 days through the Department of Driver Services. NORML’s drugged-driving compendium notes that Georgia’s framework, combined with the long detection window for cannabis metabolites (up to ~30 days for heavy users), creates a meaningful conviction risk for medical patients and out-of-state recreational users alike.

The Medical-Card Non-Defense (Mostly)

For Haleigh’s Hope cardholders, Love v. State in theory provides protection from per-se (a)(6) prosecution. In practice, however:

• Officers and prosecutors typically charge under (a)(2) "less safe," for which medical status is no defense.
• SFST observations + DRE assessment + chemical-test results combine to establish impairment.
• Cardholders carrying low-THC oil with detectable metabolites in blood face the same impairment-evidence burden as any other defendant.

Practical Guidance for Patients

• Do not drive while actively impaired by cannabis. The legal threshold under (a)(2) is "substantially altered" reactions and judgment — subjective and officer-driven.
• Refusing a chemical test triggers automatic 12-month suspension and is admissible at trial.
• Carry medical documentation but recognize that Love v. State protection runs through (a)(6); (a)(2) prosecution is unaffected.
• Any DUI conviction triggers a permanent record visible on background checks and insurance ratings; the cumulative cost (fines, court costs, surcharges, DUI Risk Reduction Program, mandatory community service, ignition-interlock device on subsequent offenses, license-suspension implications, no work permit on first drug-DUI) typically exceeds $5,000 for a first offense.