Can Marijuana Lead to a DUI Arrest in Miami?

Florida DUI Law Applies to Marijuana Impairment Even Without an Alcohol Breath Test

Yes, marijuana can lead to a DUI arrest in Miami. Florida DUI law is not limited to alcohol, and a person can be arrested when police believe cannabis impaired the person's normal faculties while driving or while in actual physical control of a vehicle.

Florida Statute § 316.193 provides that DUI can occur when a person is under the influence of alcohol, specified chemical substances, or a substance controlled under Chapter 893 to the extent that the person's normal faculties are impaired. Cannabis and tetrahydrocannabinols are listed within Florida's controlled-substance schedules under § 893.03.

That legal structure is important because Florida does not use the same .08 numerical rule for marijuana that it uses for alcohol. A prosecutor generally must establish impairment through the totality of the evidence rather than simply point to a universal THC concentration and say that number alone proves DUI.

As a Miami DUI Attorney, I therefore look closely at the State's proof connecting cannabis use to actual impairment at the time of driving. Evidence that someone used marijuana at some earlier point is not necessarily the same as proof that the person's normal faculties were impaired behind the wheel.

What Police May Look for in a Miami Marijuana DUI Investigation

A marijuana DUI investigation often develops differently from a traditional alcohol DUI. Police may notice an odor, observe marijuana or cannabis products in the vehicle, ask about recent use, evaluate the driver's eyes and coordination, or request field sobriety exercises.

Officers may also focus on driving behavior, speech, divided attention, reaction time, balance, or unusual behavior. In some cases, an officer with additional drug-recognition training may conduct a more detailed evaluation after arrest.

None of those observations should be accepted without scrutiny. Red eyes can result from allergies, fatigue, contact lenses, lack of sleep, or environmental conditions, while nervousness and poor balance can have entirely unrelated causes.

A private Miami criminal defense lawyer can compare those observations against body-camera footage and other objective evidence. When the recording shows normal speech, coordinated movement, appropriate responses, and controlled driving, the officer's marijuana impairment conclusion may become considerably easier to challenge.

Marijuana Presence Is Not the Same as Marijuana Impairment

One of the central issues in a cannabis DUI case is the difference between detecting marijuana-related substances and proving impairment. THC and its metabolites can remain detectable after the period of meaningful impairment has passed.

Florida's DUI statute focuses on impairment of normal faculties when prosecutors rely on cannabis or another controlled substance. The law does not state that the mere presence of cannabis metabolites in urine automatically establishes DUI.

That distinction can become very important when the State relies on a urine test. A positive urine result may establish prior exposure, but questions can remain about when cannabis was used, what active effects existed during the driving, and whether the laboratory result can meaningfully demonstrate impairment at that earlier time.

I may examine the type of test, collection time, toxicology report, metabolite information, officer observations, and video together. The scientific evidence must support the legal conclusion the State is asking a court or jury to make.

Medical Marijuana Does Not Automatically Prevent a DUI Charge

A person who lawfully uses medical marijuana in Florida can still be charged with DUI if prosecutors believe cannabis impaired normal faculties while driving. Authorization to possess or use marijuana does not create authorization to operate a vehicle while impaired.

At the same time, lawful medical use can provide important context. It may explain why cannabis products were in the vehicle or why a toxicology test detected cannabinoids without necessarily establishing impairment at the time of driving.

I would want to understand when the medication was used, the form of cannabis involved, dosage, tolerance, medical authorization, driving behavior, and what police video actually shows. Those facts can help separate lawful prior use from impaired driving.

Field Sobriety Exercises Can Be Challenged in Marijuana Cases

Police may rely on field sobriety exercises even though many commonly used roadside exercises were originally developed in the alcohol enforcement context. The State may still use performance as circumstantial evidence of impaired faculties.

I examine whether the exercises were administered properly and whether physical limitations affected the results. Knee injuries, back problems, inner-ear conditions, footwear, uneven pavement, anxiety, and fatigue can make a sober person look less coordinated during an artificial roadside exercise.

The complete video matters more than a police report saying you showed several "clues." A driver who performs imperfectly on one exercise while speaking clearly, walking normally, and responding appropriately throughout a lengthy encounter may have valuable defense evidence.

Urine Testing Can Create Additional Issues

Florida's implied-consent law permits qualifying urine testing under specified circumstances when law enforcement has the legally required basis to investigate controlled-substance impairment. Current Florida law can also make a qualifying refusal of a lawful urine test a separate criminal offense when all statutory conditions are met.

That means a marijuana DUI investigation can potentially produce a DUI charge, an administrative driver's-license suspension, and a separate refusal allegation. Each of those issues has different legal elements and should be examined separately.

I review whether police had sufficient grounds to request urine, whether the request complied with Florida law, whether required warnings were given, and whether the driver actually refused. A marijuana allegation should not allow the State to skip the procedural requirements governing testing.

Defenses That May Apply to a Marijuana DUI

The strongest defense depends on how the case developed. I may challenge whether the original traffic stop was lawful, whether police had probable cause for arrest, whether the driver's behavior actually demonstrated impairment, and whether toxicology can connect cannabis use to the time of driving.

Potential issues may include:

• Normal body-camera footage inconsistent with impairment;

• A urine test showing only prior cannabis exposure;

• Medical or physical explanations for police observations;

• Unreliable or improperly administered roadside exercises;

• An unlawful traffic stop or extended detention;

• Weak proof of driving or actual physical control; and

• Improperly obtained statements or testing evidence.

The objective may be suppression, dismissal, acquittal, a lawful reduction, or reduced penalties. I do not assume that the smell or presence of marijuana makes the State's impairment case complete.

Example of How I May Build the Defense

Assume a Miami driver is stopped because one rear light is not working. The officer smells cannabis and sees a lawfully labeled medical marijuana container inside the vehicle, then begins a DUI investigation.

The driver speaks clearly, produces documents without difficulty, walks normally, and completes roadside exercises with only minor errors. A later urine test detects cannabis metabolites, and prosecutors argue that the positive result confirms marijuana impairment.

I would obtain the body-camera footage, urine toxicology report, medical marijuana documentation, timing information, and the complete roadside investigation. I would examine whether the urine result establishes active impairment or simply prior use and compare the officer's impairment claims with the driver's actual behavior on video.

If prosecutors cannot connect marijuana exposure to impaired normal faculties at the time of driving, I would challenge whether § 316.193 has been proven beyond a reasonable doubt. This scenario illustrates how I may build the defense and does not represent a specific prior Musca Law result.

Why Private Representation Matters in a Marijuana DUI

Marijuana DUI cases can turn on scientific interpretation rather than a simple numerical limit. A prosecutor may have a positive urine test and police observations but still face difficulty proving that cannabis impaired your normal faculties when you were driving.

I can analyze the toxicology, roadside evidence, medical use, police video, traffic stop, testing request, and refusal allegations together. When the State is treating cannabis presence as though it automatically proves impairment, the defense can challenge that leap directly.

Miami DUI FAQs About Marijuana DUI Charges

Can I Get a DUI in Miami If Marijuana Is Legal for My Medical Use?

Yes, because lawful medical use does not authorize impaired driving. Florida DUI law applies when a controlled substance affects normal faculties to the extent required by § 316.193.

Your medical authorization can still matter to the defense because it may explain lawful possession and prior use. I would separate that issue from whether prosecutors can prove you were actually impaired.

Is There a Florida THC Limit Like the .08 Alcohol Limit?

Florida § 316.193 contains numerical .08 thresholds for blood and breath alcohol, but it does not establish a comparable universal THC concentration that automatically proves marijuana DUI.

That means the State often relies more heavily on driving behavior, physical observations, statements, toxicology, and roadside evidence. The lack of a simple per se marijuana number can make the interpretation of the evidence particularly important.

Does a Positive Urine Test Mean I Was High While Driving?

Not necessarily. A urine test can demonstrate prior cannabis exposure without necessarily establishing the degree of impairment at the earlier time the vehicle was being operated.

I examine what substance or metabolite was detected and what conclusions the toxicology can reasonably support. The State should not be allowed to treat detection and impairment as identical concepts when the science does not support that conclusion.

Can Police Arrest Me Because They Smell Marijuana?

An odor can become part of the circumstances police consider, but a DUI arrest still requires legally sufficient grounds relating to impaired driving or actual physical control. The precise significance of odor can also depend on the other circumstances and current Florida cannabis laws.

I examine what officers observed beyond the smell itself. Normal driving, clear speech, coordination, and favorable video can matter when challenging probable cause or ultimate impairment.

Can Marijuana DUI Be Reduced to Reckless Driving?

Potentially, depending on the evidence and whether a lesser disposition is legally available. A weak toxicology connection, favorable video, questionable stop, or poor impairment evidence may provide negotiating leverage.

A reduction is never automatic simply because marijuana rather than alcohol is involved. I first determine whether dismissal or acquittal may be supportable before advising a client to accept another criminal charge.

Can a Marijuana DUI Be Dismissed?

Yes, when the State cannot prove impairment or when constitutional or evidentiary problems eliminate critical evidence. A positive cannabis test alone does not necessarily establish the required impairment of normal faculties.

I examine the complete record before assessing dismissal. The strongest defense may come from toxicology, video, medical evidence, the traffic stop, or a combination of those issues.

Call Our Miami DUI Attorney to Fight Your Marijuana DUI Charges

A marijuana DUI charge should not be treated as proven merely because police found cannabis or a test detected cannabinoids. I can examine the traffic stop, police video, urine testing, toxicology, medical marijuana use, roadside exercises, statements, and alleged impairment while pursuing dismissal, suppression, acquittal, a lawful reduction, or reduced penalties.

Contact Musca Law 24/7/365 at 1-888-484-5057 For Your FREE Consultation.

Musca Law, P.A. has a team of experienced criminal defense attorneys dedicated to defending people charged with criminal and traffic offenses. We are available 24/7/365 at 1-888-484-5057 for your FREE consultation and represent clients throughout Florida from 35 office locations.