If you were arrested for DUI after taking a medication exactly as your doctor prescribed, the first thing to know is that the State has a harder case to prove than it does with alcohol. I am Rocky Brancato, founder of The Brancato Law Firm, P.A., a Tampa criminal defense firm; I am a member of the National College for DUI Defense and a former police academy instructor who trained officers, and I have spent more than 25 years in Hillsborough County courtrooms. In prescription drug DUI cases, our attorneys start with the toxicology report, the prescription records, and the officer’s video, because the gap between a drug being present and a driver being impaired is where these cases are won.

Can you get a DUI for prescription drugs in Florida?

Yes. Section 316.193(1)(a), Florida Statutes, makes it a crime to drive or be in actual physical control of a vehicle while “under the influence of alcoholic beverages, any chemical substance set forth in s. 877.111, or any substance controlled under chapter 893, when affected to the extent that the person’s normal faculties are impaired.” The statute does not exempt drugs taken with a prescription. The penalties for a prescription drug DUI are the same as for an alcohol DUI, which our guide to Florida DUI penalties lays out.

Which prescription drugs can lead to a DUI charge in Florida?

The drugs that most often lead to DUI arrests are the sedating and stimulant medications listed on Florida’s controlled substance schedules in section 893.03, Florida Statutes. The table shows common examples and where each appears.

Some widely prescribed medications that can cause drowsiness, including gabapentin, the muscle relaxer cyclobenzaprine, the antihistamine diphenhydramine, and the antidepressant amitriptyline, do not appear in section 893.03. When the toxicology report shows only a drug of that kind, our attorneys at The Brancato Law Firm question whether the substance fits the statute at all before the case reaches a jury.

Is a valid prescription a defense to DUI in Florida?

A prescription alone is not a defense. If the State proves the medication impaired your normal faculties, the fact that a doctor prescribed it does not change the verdict. A prescription still matters to the defense in three ways: it explains why the drug was in your system, it shows the dose you were supposed to take, and it can support the argument that a therapeutic dose did not impair you.

Florida law also recognizes involuntary intoxication in DUI cases. In Carter v. State, 710 So. 2d 110 (Fla. 4th DCA 1998), a driver testified he took four tablets a friend handed him as ibuprofen; the friend testified she kept her prescribed amitriptyline in the same container and realized the next day she had given him the wrong pills. The trial court refused to instruct the jury on involuntary intoxication. The Fourth District reversed his conviction and ordered a new trial, holding that when there is evidence a driver unknowingly ingested a substance that impaired him and drove without knowing he was or would become impaired, the jury must be instructed on involuntary intoxication. The lesson today: a mistaken pill, a pharmacy error, or an unexpected drug reaction can raise a real defense, but only if the evidence is gathered and presented.

How do police investigate a prescription drug DUI in Florida?

Police build a drug DUI case from driving behavior, field sobriety exercises, statements about medication, and a urine or blood test. When drugs are suspected, the arresting officer may call a drug recognition expert, an officer trained in a 12-step evaluation protocol. Our post on drug recognition experts in Florida explains that protocol in detail.

Florida courts allow drug recognition testimony, but it does not settle the case. In Williams v. State, 710 So. 2d 24 (Fla. 3d DCA 1998), a driver blew 0.07 at a checkpoint, two officers trained as drug recognition experts concluded he was under the influence of alcohol, a stimulant, and cannabis, and his urine tested positive for cocaine and marijuana metabolite. The Third District held that the drug recognition evidence was admissible, but stressed that “the State is still required to prove beyond a reasonable doubt that the defendant is impaired by a chemical or controlled substances.” The weight of that testimony is for the jury, and our attorneys cross-examine the evaluator on every step of the protocol.

Testing also has limits. A urine test can show a drug or its metabolite was present, but not how much was affecting the driver at the time of driving. A blood test generally requires a warrant or valid consent, because the U.S. Supreme Court held in Birchfield v. North Dakota, 579 U.S. 438 (2016), that police may require a breath test without a warrant after a DUI arrest but not a blood test. Breath tests detect alcohol, not drugs.

How often are drugs involved in Florida crashes?

Florida recorded 553 drug-confirmed crashes and 325 drug-confirmed traffic deaths in 2023, according to the Florida Department of Highway Safety and Motor Vehicles’ Impaired Driving Annual Report (January 2025). Prescription-type drugs show up in national data as well. In a 2022 National Highway Traffic Safety Administration study of 7,279 seriously or fatally injured road users at seven Level 1 trauma centers, including one in Jacksonville, 9.3% tested positive for opioids, 10.8% for stimulants, and 7.5% for sedatives, according to Alcohol and Drug Prevalence Among Seriously or Fatally Injured Road Users (DOT HS 813 400).

Those numbers measure presence, not impairment. A person who takes a daily prescription can test positive for weeks, which is why our attorneys at The Brancato Law Firm treat a positive result as the starting point of the analysis.

Why is a drug DUI harder for the State to prove than an alcohol DUI?

A drug DUI is harder to prove because Florida has no per se drug limit. For alcohol, a 0.08 result is itself a crime and is prima facie evidence of impairment under section 316.1934. No statute sets a comparable number for oxycodone, alprazolam, or zolpidem, so the State must connect the drug to the driver’s impairment with other evidence.

Florida legal writers identified the problem decades ago. In a 1998 Florida Bar Journal article, “The Drugged Driver and the Need for a Per Se Law” (Vol. 72, No. 7), Betty J. Buchan and Mark F. Lewis explained that urine results show whether a drug was present but not how much, and that drug recognition testimony needs other evidence of impairment behind it. The Legislature has not adopted a per se drug limit, so those weaknesses remain in the State’s case today.

How do our attorneys fight a prescription drug DUI in Florida?

Our attorneys fight a prescription drug DUI by separating presence from impairment at every step. This is the framework we use:

1. Challenge the stop and the arrest. If the officer lacked a lawful reason to stop the car or probable cause to arrest, a motion to suppress can remove the test results and the observations.
2. Identify the exact substance. We confirm what the lab found and whether that drug is a controlled substance under chapter 893 or a chemical listed in section 877.111.
3. Get the prescription and dosing records. A therapeutic dose taken as directed is strong evidence that the driver was functioning normally.
4. Attack the timing. Urine results and many blood results cannot show when a drug was taken or whether it was active while the person was driving.
5. Cross-examine the drug recognition evaluation. We check each step of the protocol against the video and the evaluator’s training records.
6. Explain the clues another way. Fatigue, diabetes, inner-ear problems, injuries, and anxiety can produce the same signs officers attribute to drugs.
7. Raise involuntary intoxication when the facts support it. A pharmacy error, a mislabeled container, or an unexpected interaction can support the instruction approved in Carter.

Prescription drug DUI cases often turn on toxicology, and our forensic science defense work includes consulting independent toxicologists. In Hillsborough County, the State Attorney’s RIDR diversion program has a separate track for drug-related DUI, with 50 community service hours and 3 months of a drug-detection sweat patch in place of an ignition interlock, and our attorneys screen every first-time client for it. Our Hillsborough County criminal defense page explains how these cases move through county court. Our Tampa DUI defense attorney page describes the rest of our DUI work.

What results has our firm obtained in drug DUI cases?

Past results do not guarantee future outcomes.

Frequently asked questions about prescription drug DUI in Florida

Can you get a DUI for taking Xanax as prescribed in Florida?

Yes, if the State proves the alprazolam impaired your normal faculties while you were driving. The Brancato Law Firm uses the prescription, the dose, and the timing to show the jury that a therapeutic dose did not impair your driving.

Is there a legal limit for prescription drugs while driving in Florida?

No. Florida has a 0.08 limit for alcohol but no numeric limit for any prescription drug, so the State must prove actual impairment. Our attorneys at The Brancato Law Firm press that point in every drug DUI case, because without a per se number the officer’s observations carry the State’s case.

Can a prescription drug DUI be dropped in Florida?

Yes. Drug DUI charges can be dropped or reduced when the stop was unlawful, the lab cannot tie the drug to impairment, or the substance does not fit the statute. The Brancato Law Firm pursues those arguments before trial and negotiates reductions to reckless driving when the evidence supports it, as described on our DUI lawyer in Tampa page.

Does a positive urine test prove I was impaired by my medication?

No. A urine test shows that a drug or its metabolite was present, not how much was active when you were driving. The Brancato Law Firm works with independent toxicologists to explain that limit to prosecutors and juries.

Should I tell the officer what medications I take?

You have the right to remain silent, and statements about medication are often the State’s best evidence of what drug was involved. Our attorneys at The Brancato Law Firm advise clients to give identification and documents the law requires and to decline other questions until they have spoken with a lawyer, as our guide on what happens after a DUI arrest explains.

Can a prescription drug DUI affect my commercial driver’s license?

Yes. A DUI conviction for a controlled substance disqualifies a CDL holder from commercial driving for at least one year, even if it happened in a personal car. The Brancato Law Firm explains the rules in our guide on what happens to a CDL after a DUI in Florida.

For how The Brancato Law Firm, P.A. defends these cases, see our Tampa drug crimes defense practice.

Talk to our attorneys about a prescription drug DUI

The toxicology report, the video, and your prescription records are the core of a drug DUI defense, and the 10-day license deadline started at your arrest. Call The Brancato Law Firm, P.A., founded by Tampa Criminal Defense Attorney Rocky Brancato, at (813) 727-7159, and our attorneys will request your license review and begin gathering those records. You can call us at any hour. Our firm has Spanish-speaking staff, and attorney Jean-Luc Adrien speaks Spanish, Haitian Creole, and French. For more about our defense strategies, visit our DUI defense page.

The Brancato Law Firm, P.A.
620 E. Twiggs Street, Suite 205, Tampa, FL 33602
(813) 727-7159
Serving Hillsborough, Pinellas, and Pasco Counties

The Brancato Law Firm, P.A. is a Tampa-based criminal defense practice. We are not affiliated with any other Brancato-named law firms.

As founder of The Brancato Law Firm, P.A., a Tampa criminal defense firm, and a former police academy instructor, I know how much of a marijuana DUI case rests on one officer’s opinion about a driver’s eyes, speech, and balance. I am a member of the National College for DUI Defense, and I have tried more than 150 jury trials to verdict. Our attorneys defend marijuana and drug DUI cases across Hillsborough, Pinellas, and Pasco Counties by testing that opinion against the video, the lab report, and the science.

Can you be charged with DUI for marijuana in Florida?

Yes. Under section 316.193(1)(a), Florida Statutes, a person commits DUI if the person “is under the influence of alcoholic beverages, any chemical substance set forth in s. 877.111, or any substance controlled under chapter 893, when affected to the extent that the person’s normal faculties are impaired.” Cannabis and THC are controlled under chapter 893, so driving while impaired by marijuana is DUI.

The key words are “normal faculties are impaired.” The State has to prove that marijuana actually impaired your normal faculties while you were driving, which is more than proving you had used it. Our Tampa DUI lawyer team builds the defense around that element, because it is the hardest one for the State to prove in a drug case.

Is there a legal THC limit for driving in Florida?

No. Section 316.193 sets a per se limit only for alcohol, a blood or breath alcohol level of 0.08 or higher. There is no THC number that makes driving a crime by itself, so a marijuana DUI is always an impairment case.

Without a number to point to, prosecutors lean on the officer’s observations and on drug recognition testimony. That is where our attorneys at The Brancato Law Firm focus cross-examination.

Why is THC in your blood not proof of impairment?

Because research shows THC levels do not line up with how impaired a person is. The National Highway Traffic Safety Administration told Congress in Marijuana-Impaired Driving: A Report to Congress (DOT HS 812 440, July 2017) that “the level of THC in the blood and the degree of impairment do not appear to be closely related,” and that “THC level in blood (or oral fluid) does not appear to be an accurate and reliable predictor of impairment from THC.”

A controlled driving study points the same way. In Marcotte and colleagues, Driving Performance and Cannabis Users’ Perception of Safety, published in JAMA Psychiatry in 2022, 191 regular cannabis users were randomly assigned to placebo, 5.9% THC, or 13.4% THC cannabis and then tested in a driving simulator. Driving scores in the THC groups dropped at 30 minutes and 1.5 hours, were borderline at 3.5 hours, and were gone by 4.5 hours. The authors concluded that impairment “cannot be inferred based on … THC blood concentrations.”

The AAA Foundation for Traffic Safety reached a similar conclusion in its 2016 study of DUI arrest data, An Evaluation of Data from Drivers Arrested for Driving Under the Influence in Relation to Per se Limits for Cannabis, finding that “a quantitative threshold for per se laws for THC following cannabis use cannot be scientifically supported.” The foundation reported that 70% of cannabis-positive DUI arrestees in its data had THC levels below 5 ng/mL. Our attorneys at The Brancato Law Firm use these sources with defense toxicologists to show a jury why a positive test is the start of the question.

How do police test for marijuana after a DUI arrest in Florida?

Usually with a urine test, and sometimes with blood. Under section 316.1932, Florida Statutes, a driver lawfully arrested for DUI has consented to a urine test, which “must be incidental to a lawful arrest and administered at a detention facility or any other facility, mobile or otherwise, which is equipped to administer such tests … in a reasonable manner that will ensure the accuracy of the specimen and maintain the privacy of the individual.”

The forced blood draw comes from section 316.1933, Florida Statutes. The refusal crime comes from Trenton’s Law, chapter 2025-121, Laws of Florida, effective October 1, 2025, which made a first refusal of a lawful breath or urine test a second-degree misdemeanor under section 316.1939, Florida Statutes. A blood refusal is still not a crime. Our post on breath test refusal in Florida walks through the warnings an officer must give.

Can THC test results be used against you at trial?

Often, but a judge can keep them out when they mislead more than they prove. In State v. Sercey, 825 So. 2d 959 (Fla. 1st DCA 2002), an Alachua County DUI manslaughter case, the court held that standard THC testing is not novel science, so evidence of THC “is therefore admissible even if it cannot be quantitatively related to impairment, unless it is excluded under section 90.403.” The court also upheld the exclusion of expert opinions that tried to estimate when the driver last used marijuana.

Section 90.403, Florida Statutes, is the rule that excludes evidence when unfair prejudice substantially outweighs its value. In Estrich v. State, 995 So. 2d 613 (Fla. 4th DCA 2008), a Palm Beach County fatal crash case, the State introduced 39 nanograms of carboxy-THC, a THC metabolite. The evidence showed it “probably did not affect” the driver at the time of the crash, so the court held it should have been excluded and ordered new trials.

Together these cases set the defense playbook. Our attorneys at The Brancato Law Firm look at exactly what the lab measured, whether it was THC itself or a metabolite, and how long after driving the sample was taken, and we file a motion to exclude when the number cannot speak to impairment.

What is a drug recognition expert, and is the opinion reliable?

A drug recognition expert, or DRE, is an officer trained to run a 12-step evaluation and give an opinion about which drug category is impairing a driver. In Williams v. State, 710 So. 2d 24 (Fla. 3d DCA 1998), the court held that the 12-step protocol “is not ‘scientific'” and allowed the officer’s opinion that the driver was impaired by specific drug categories. The court treated the horizontal gaze nystagmus eye test as “quasi-scientific,” admissible only with a foundation that a qualified officer administered it properly. A dissenting judge warned that a DRE “is not a toxicologist.”

Williams was decided under an older standard for scientific evidence, so our attorneys challenge DRE opinions under the current rules and test whether each of the 12 steps was done and recorded. Our post on drug recognition experts in Florida explains the evaluation step by step.

Does a medical marijuana card protect you from a DUI?

No. Section 381.986(14)(g), Florida Statutes, states that the medical marijuana law “does not exempt a person from prosecution for a criminal offense related to impairment or intoxication resulting from the medical use of marijuana or relieve a person from any requirement under law to submit to a breath, blood, urine, or other test to detect the presence of a controlled substance.”

The card also does not cover use in a car. “Medical use” excludes use “In a school bus, a vehicle, an aircraft, or a motorboat,” except for low-THC cannabis not in a form for smoking, and using marijuana in a vehicle is a first-degree misdemeanor under section 381.986(12)(c). A lawful patient can still be a sober driver, though, and our attorneys at The Brancato Law Firm show the jury the difference between a patient who has THC in the body and a driver whose faculties were impaired. Possession rules for patients are covered in our guide on how to fight a marijuana possession charge in Florida, and our guide on how to legally transport medical marijuana in Florida covers the packaging rules, the registry card, and odor-based car searches.

Can you get a DUI for delta-8 or hemp products in Florida?

Possibly, and the question is unsettled. Delta-8 THC is listed in Schedule I at section 893.03(1)(c)190.a., Florida Statutes, but section 581.217, Florida Statutes provides that hemp-derived cannabinoids “are not controlled substances or adulterants if they are in compliance with this section.” A compliant hemp product therefore has a strong argument that it is not a “substance controlled under chapter 893” for the DUI statute. We have found no Florida appellate decision on that argument.

The State will answer that the product was not compliant, for example because it exceeded 0.3% total delta-9 THC or was synthesized. The federal picture also changes on November 12, 2026, when Public Law 119-37 narrows the federal definition of hemp and excludes cannabinoids synthesized outside the plant, according to the Congressional Research Service. Florida’s hemp statute does not adopt the federal text, so a Florida DUI still turns on Florida law. Hemp products in Florida are legal to sell to adults 21 and older when they meet section 581.217, but legal to buy never means legal to drive impaired. Our attorneys at The Brancato Law Firm get the product, its label, and its certificate of analysis into evidence early, because lab proof of the exact cannabinoid can decide the case.

How common are marijuana-involved crashes in Florida?

Hundreds a year. In 2023, marijuana was reported in 417 Florida crashes, down from 554 in 2020, according to the Florida Department of Highway Safety and Motor Vehicles report Impaired Driving Education Campaign, presented to the Governor and Cabinet on January 31, 2025. The same report counted 969 impaired-driving fatalities statewide in 2023, involving alcohol, drugs, or both.

These figures count crashes where marijuana was reported, and one crash can count under more than one drug. They do not show that marijuana caused the crash. Our attorneys at The Brancato Law Firm keep that distinction in front of the jury, because the State often treats “reported” as “impaired.”

What are the penalties for a marijuana DUI in Florida?

The same as for an alcohol DUI. Under section 316.193, a first conviction carries up to 6 months in jail, a fine of $500 to $1,000, probation of up to 1 year, at least 50 hours of community service, and a 10-day vehicle impoundment. DUI with property damage or injury is a first-degree misdemeanor, DUI with serious bodily injury is a third-degree felony, and DUI manslaughter carries a 4-year mandatory minimum. Our guide to the penalties for DUI in Hillsborough County covers every tier.

Your license is a separate case. If you refused a urine or breath test, your license is suspended for the refusal, and you have 10 days from the notice of suspension to request review. Our post on how to protect your driver’s license after a DUI arrest explains the choices, and our attorneys at The Brancato Law Firm handle the license review and the criminal case together.

What are the penalties for a second or third marijuana DUI in Florida?

They rise with each conviction and with how recent the last one was. Under section 316.193, Florida Statutes, a second DUI carries a fine of $1,000 to $2,000 and up to 9 months in jail, and a third DUI within 10 years of a prior conviction, or any fourth DUI, is a third-degree felony punishable by up to 5 years in prison under section 775.082, Florida Statutes. License revocation periods come from section 322.28, Florida Statutes, and they apply the same way whether the impairment came from marijuana or alcohol.

A third DUI more than 10 years after the last conviction stays a misdemeanor, with a fine of $2,000 to $5,000 and up to 12 months in jail. The court must also order an ignition interlock device for at least 1 year after a second conviction and at least 2 years after a third. These are the base penalties; a minor in the vehicle raises them. Because prior convictions drive every number in this table, our attorneys at The Brancato Law Firm pull the dates and court records of each prior before advising on any plea.

How do our attorneys fight a marijuana DUI charge?

We take apart each piece of the impairment case:

1. The stop. We review whether the officer had a lawful reason to stop the car and to extend the stop for a drug investigation.
2. The driving. We compare the arrest report with the dash camera and body camera video.
3. The roadside exercises. We check how they were explained and scored, and whether the video matches the report.
4. The DRE evaluation. We check every one of the 12 steps against the DRE’s own written record.
5. The lab. We identify whether the result was THC itself or a metabolite, when the sample was taken, and how the urine collection was handled under section 316.1932.
6. The product. For delta-8 and hemp, we test whether the substance was a controlled substance at all.
7. The science. We use the NHTSA, AAA, and JAMA Psychiatry research, with defense experts, to show why THC in the body is not proof of impairment.

What should you do after a marijuana DUI arrest in Tampa?

Move fast on the license and the evidence. A person arrested in Hillsborough County sees a judge at first appearance within 24 hours, usually at the Orient Road Jail. Then:

1. Mark the 10-day deadline if your license was suspended for a refusal.
2. Write down the timeline of when you last used any product and when you were tested.
3. Keep the product and its packaging, including any hemp label or certificate of analysis.
4. Do not discuss the case on jail calls or social media.
5. Call a DUI lawyer before the first court date, so video and lab records can be requested early.

Frequently asked questions about marijuana DUI in Florida

Can marijuana DUI charges be dropped in Florida?

Yes, when the State cannot prove impaired normal faculties, when a THC result is excluded, or when the stop is suppressed. The Brancato Law Firm puts those weaknesses in front of the prosecutor early, as described on our Tampa DUI defense page.

How long after smoking marijuana can you be charged with DUI in Florida?

Florida has no time rule; the question is whether you were impaired when you drove. In the 2022 JAMA Psychiatry simulator study, measured driving impairment was gone by 4.5 hours, and our attorneys at The Brancato Law Firm build the timeline of use, driving, and testing to show the gap.

Is refusing a urine test for marijuana a crime in Florida?

Yes, since October 1, 2025, a first refusal of a lawful urine test is a second-degree misdemeanor, and it also brings a 1-year license suspension. The Brancato Law Firm checks whether the officer gave the warnings the law requires, as our post on refusal in Florida explains.

Is a medical marijuana card a defense to DUI in Florida?

No; section 381.986(14)(g) says the medical marijuana law does not protect a patient from an impairment prosecution. Our attorneys at The Brancato Law Firm still use the patient’s records to explain why THC was present without impairment, and our marijuana possession guide covers the card’s limits.

Can you get a DUI for delta-8 in Florida?

You can be arrested for it, but whether a compliant hemp product is a “controlled substance” under the DUI statute is unresolved in Florida’s appellate courts. The Brancato Law Firm gets the product tested and challenges the State’s proof of what the driver actually used.

Does a drug recognition expert’s opinion prove I was high?

No; it is one officer’s opinion, and a Florida court has held the 12-step protocol “is not ‘scientific.'” Our attorneys at The Brancato Law Firm cross-examine DREs step by step, as described in our post on drug recognition experts.

Will a marijuana DUI suspend my license in Florida?

It can, through a refusal suspension at arrest or a revocation after conviction. The Brancato Law Firm requests the license review within the 10-day window and coordinates it with the criminal defense, and our DUI license guide explains the options.

For how The Brancato Law Firm, P.A. defends these cases, see our Tampa drug crimes defense practice.

Speak with a Tampa marijuana DUI lawyer

Your license and your criminal case run on separate clocks after a marijuana DUI arrest, and the license clock can be as short as 10 days. The Brancato Law Firm, P.A., founded by Tampa Criminal Defense Attorney Rocky Brancato, will request the video and lab records, challenge the DRE opinion, and protect your driving privilege. Call (813) 727-7159 for a free, confidential consultation. You can call us at any hour; our office is two blocks from the courthouse. Our firm has Spanish-speaking staff, and attorney Jean-Luc Adrien speaks Spanish, Haitian Creole, and French. Read our guide for criminal defense in Spanish and Haitian Creole in Tampa.

For more about our defense strategies, visit our Tampa DUI Lawyer page.

The Brancato Law Firm, P.A.

620 E. Twiggs Street, Suite 205, Tampa, FL 33602

(813) 727-7159

Serving Hillsborough, Pinellas, and Pasco Counties

The Brancato Law Firm, P.A. is a Tampa-based criminal defense practice. We are not affiliated with any other Brancato-named law firms.

In most drug DUI cases there is no breath number to show the jury, so the State builds its case around an officer trained to read drug impairment in a driver’s eyes, pulse, and balance. I learned how officers are trained to build that kind of testimony as a former police academy instructor, and I am a member of the National College for DUI Defense. As founder of The Brancato Law Firm, P.A., a Tampa criminal defense firm, I have tried more than 150 jury trials to verdict, and our attorneys take DRE evaluations apart one step at a time: the officer’s training file, the video, the vital signs, and the toxicology.

What does a drug recognition expert do in a Florida DUI case?

A drug recognition expert gives the State an opinion that a driver was impaired by drugs and names the drug category the officer believes caused it. Florida’s DUI law, section 316.193, Florida Statutes, makes it a crime to drive while impaired by alcohol, by a chemical substance listed in section 877.111, or by any controlled substance under chapter 893. A breath test measures only alcohol. When a driver blows a low number but still appears impaired, the arresting officer may call a DRE, usually to a police station or jail after the arrest.

The DRE tries to answer three questions. Is the driver impaired? Is the impairment caused by a medical problem or by drugs? If drugs, which category? That opinion often becomes the center of the State’s case when the charge involves marijuana, prescription medication, or illegal drugs. Our Tampa DUI lawyer page explains how The Brancato Law Firm defends these cases from arrest through trial, and our posts on marijuana DUI charges in Florida and DUI for prescription drugs in Florida cover the drug-specific issues.

How does a police officer become a drug recognition expert in Florida?

A Florida officer becomes a DRE by finishing a classroom phase, a supervised field phase, and a recertification every two years. The Institute of Police Technology and Management (IPTM) at the University of North Florida runs Florida’s Drug Recognition Expert program, and the Florida Department of Transportation funds it for Florida officers.

One of those requirements matters in every Tampa Bay case. Before an officer can enter Florida’s DRE program, an Assistant State Attorney in that officer’s judicial circuit must endorse the application in writing. In Hillsborough County, that means a prosecutor from the 13th Judicial Circuit’s State Attorney’s Office. In Pinellas and Pasco Counties, it means the 6th Circuit’s office. The DRE who testifies against a driver was vouched for by the same office prosecuting the case, which is one reason our attorneys request the officer’s full certification file, evaluation log (often called a rolling log), and recertification history before any deposition.

DREs are also scarce. A January 2024 Florida Department of Highway Safety and Motor Vehicles report on impaired driving counted 54 certified DREs in the entire Florida Highway Patrol. FHP Troop C, headquartered in Tampa and covering Hillsborough, Pinellas, Pasco, Polk, Hernando, Citrus, and Sumter Counties, had 11 of them, the most of any troop. Those figures cover only FHP; sheriff’s offices and city police departments train their own DREs. The same FLHSMV report shows Florida recorded 617 drug-confirmed crashes and 367 drug-confirmed traffic deaths in 2022. Nationally, IPTM reports more than 8,000 certified DREs, about 1.1% of all law enforcement officers.

What are the 12 steps of a DRE evaluation?

A DRE evaluation follows a standardized 12-step protocol, and the officer is trained to complete every step in order. The steps below come from the AAA Foundation for Traffic Safety’s 2019 review, Drug Evaluation and Classification: Review of the Program and Opportunities for Enhancement. The right-hand column shows what The Brancato Law Firm’s attorneys examine at each step.

Step 2 deserves attention. The DRE usually hears the arresting officer’s account before examining the driver, so our attorneys look at whether the DRE read borderline signs to fit a conclusion someone else had already reached. Step 11 also comes before step 12, which means the DRE commits to a drug category before anyone knows what the lab will find.

Step 10 raises a constitutional issue. In Allred v. State, 622 So. 2d 984 (Fla. 1993), the Florida Supreme Court reviewed DUI arrests in which officers asked arrested drivers to recite the alphabet out of order. The court held that the request was custodial interrogation under the Florida Constitution, so Miranda warnings were required before the incriminating answers could be used. Applying the test from Allred v. State, 622 So. 2d 984 (Fla. 1993), questions put to an arrested driver about what drugs were taken and when are designed to draw an incriminating answer, which makes them interrogation as well.

What are the seven drug categories a DRE can name?

A DRE can name one or more of seven drug categories, grouped by the signs and symptoms the drugs tend to produce. The AAA Foundation’s review notes that these groupings reflect shared signs and symptoms rather than how the drugs work pharmacologically.

The categories matter in court because many signs overlap. Dilated pupils, a fast pulse, or poor balance can fit more than one category, and each can also have a medical cause. Several categories include lawful prescriptions, so a driver taking medication exactly as prescribed can still be accused of DUI. Our attorneys at The Brancato Law Firm compare each sign the DRE recorded against the category the DRE named, because an opinion that ignores inconsistent signs is open to attack.

Is a drug recognition expert’s opinion admissible in Florida?

Yes, Florida courts have admitted DRE testimony, but the leading appellate decision is nearly 30 years old and was decided under an evidence standard Florida no longer uses. In Williams v. State, 710 So. 2d 24 (Fla. 3d DCA 1998), a county court certified four questions to the Third District Court of Appeal about whether DRE evidence had to pass the Frye “general acceptance” test for scientific evidence. The Third District held that the general portion of the DRE protocol, meaning the vital signs, pupil checks, field sobriety exercises, and similar observations, was not scientific, so Frye did not apply. The court held that DRE testimony was admissible as relevant evidence of impairment once the State laid a proper foundation. It also held that horizontal gaze nystagmus (HGN) results come in when a qualified DRE administered the test correctly, but HGN alone cannot prove a blood alcohol level of 0.08 or more.

Judge Cope dissented in part in Williams v. State, 710 So. 2d 24 (Fla. 3d DCA 1998). He would have excluded the scientific portion of the evaluation and the officer’s opinion that specific drugs caused the impairment, writing that the drug examiner “is not a toxicologist or other scientist.”

The Williams majority relied in part on State v. Meador, 674 So. 2d 826 (Fla. 4th DCA 1996), a DUI case in which the Fourth District held that HGN is scientific evidence and cannot be admitted as a lay observation without a proper scientific foundation. State v. Meador, 674 So. 2d 826 (Fla. 4th DCA 1996) also held that officers describing balance exercises should avoid words like “test,” “pass,” and “fail” that give the exercises an unwarranted scientific aura. Our attorneys use both decisions to hold the State to its foundation before a DRE says a word to the jury.

Can a DRE opinion be challenged under Florida’s Daubert standard?

Yes. Florida now judges expert testimony under the Daubert standard, which asks whether an opinion rests on sufficient facts or data, reliable principles and methods, and a reliable application of those methods to the case. The Legislature amended section 90.702, Florida Statutes, in 2013, and the Florida Supreme Court adopted the amendment as a rule of evidence in In re Amendments to the Florida Evidence Code, 278 So. 3d 551 (Fla. 2019).

Williams v. State, 710 So. 2d 24 (Fla. 3d DCA 1998) was decided under Frye, and its reasoning turned on whether the protocol was “scientific.” Section 90.702 covers scientific, technical, and other specialized knowledge, so it reaches the part of a DRE’s testimony that does the most damage: the opinion that a particular drug category caused the impairment. As of this writing, our research has not found a published Florida appellate opinion that re-examines the DRE protocol under Daubert. That leaves the question open in Hillsborough, Pinellas, and Pasco courtrooms, and The Brancato Law Firm evaluates a Daubert challenge in every case where a DRE’s category opinion is central to the State’s proof.

What did New Jersey’s Supreme Court decide about DRE testimony in 2023?

New Jersey’s highest court admitted DRE testimony in 2023 but placed four limits on it, and Florida defense lawyers can cite that decision as persuasive authority. In State v. Olenowski, 255 N.J. 529 (2023), a driver struck a telephone pole, showed slurred speech and balance trouble, and was evaluated by a certified DRE at police headquarters. After a special master took extensive testimony, the New Jersey Supreme Court held on November 15, 2023, that DRE testimony meets a Daubert-type reliability standard, but only with these safeguards:

• The DRE may testify only that the evaluation is “consistent with” use of one or more drug categories, and may not testify that drugs actually caused the driver’s impairment.
• When feasible, the State must make a reasonable attempt to obtain a blood or urine toxicology report. If it does not, and has no persuasive justification, the DRE’s opinion must be excluded.
• The defense must have a fair opportunity to impeach the DRE and present its own evidence.
• Model jury instructions on DRE evidence should be considered.

The opinion also exposed a gap in the data. The defense pointed to 105 New Jersey evaluations in which toxicology found no drugs, and in 82 of them a DRE had still opined that the driver was drug-impaired. The court declined to treat that as a 78% false-positive rate because the sample was skewed, and it also rejected the State’s claimed 3% error rate. In State v. Olenowski, 255 N.J. 529 (2023), the court concluded that DRE accuracy could not be reliably calculated from the New Jersey data. The decision does not bind Florida courts, but our attorneys use its framework to ask Florida judges to limit what a DRE can say.

How accurate are drug recognition experts?

Research shows DREs can often recognize that a driver is impaired, but the evidence that they can name the right drug category is weaker. The AAA Foundation’s 2019 review by Douglas J. Beirness and Amy J. Porath found that laboratory studies generally support officers’ ability to detect impairment but do not strongly support their accuracy in identifying the drug class, with high miss and false-alarm rates for some categories. The authors reported that field studies show higher accuracy, but those studies probably undercount false negatives because drivers without outward signs are rarely evaluated. They also noted that the standardized field sobriety tests were developed and validated for alcohol, not drugs, and that much of the DRE research predates 2000.

A 2021 National Highway Traffic Safety Administration study, Exploring the Predictive Validity of Drug Evaluation and Classification Program Evaluations (DOT HS 813 013), found that a set of 22 signs and symptoms correctly sorted 86.5% of 2,253 evaluations into the right drug category, dropping to 75.6% for drug combinations. The study used only evaluations already confirmed by toxicology, and its authors stated it was not meant to determine the accuracy of DREs.

How do our attorneys challenge DRE evidence in a Florida DUI case?

Our attorneys challenge DRE evidence by testing the officer, the evaluation, and the toxicology separately, because a weakness in any one of them can undercut the opinion. In a typical case, The Brancato Law Firm works through six areas:

1. Certification and records. Confirm the DRE was certified and current on the date of the evaluation, and obtain the evaluation log, training records, and recertification history.
2. Video and timing. Obtain jail and body camera video and compare it to the DRE’s written report to find steps that were skipped, rushed, or done out of order.
3. Medical explanations. State v. Meador, 674 So. 2d 826 (Fla. 4th DCA 1996) recognized that nystagmus has causes other than alcohol, including natural causes, seizure medications, barbiturates, and other depressants, and that fatigue, age, and eye debris can affect results. Injuries, illness, and fatigue can also produce signs a DRE may read as drug impairment.
4. Toxicology mismatch. If the lab finds no drug, or a drug in a different category than the DRE named, the opinion loses its footing. Presence alone is also not impairment. Under State v. Sercey, 825 So. 2d 959 (Fla. 1st DCA 2002), a DUI manslaughter case involving THC, the State may introduce evidence that a drug was present even without a level tied to impairment, but it still must prove the driver’s normal faculties were impaired.
5. Daubert and limiting motions. Move to exclude or limit the category opinion under section 90.702, using State v. Olenowski, 255 N.J. 529 (2023) as persuasive authority for a “consistent with” limit and State v. Meador, 674 So. 2d 826 (Fla. 4th DCA 1996) to keep out “pass” and “fail” language.
6. Independent experts. Bring in a toxicologist or other qualified expert to explain what the signs and lab results do and do not show. Our post on why expert witnesses matter in Florida criminal cases and our Tampa criminal forensic science attorney page explain how we use them.

For more on the balance exercises that make up step 5, see our post on how to challenge field sobriety tests in Tampa.

Do you have to take a DRE evaluation or a urine test in Florida?

Florida law treats the DRE’s physical evaluation and a chemical test differently. No statute suspends a license for declining the eye checks and balance exercises, but the Florida Supreme Court held in State v. Taylor, 648 So. 2d 701 (Fla. 1995) that a driver’s refusal to perform field sobriety tests is admissible at trial as evidence of consciousness of guilt, where the officer explained the tests and warned of the consequences of refusing.

A urine test carries harsher consequences. Under section 316.1932, Florida Statutes, a driver lawfully arrested for DUI can be asked for a urine sample when the officer has reasonable cause to believe the driver was under the influence of chemical or controlled substances. A first refusal brings a one-year license suspension, and the refusal is admissible in the criminal case. Since October 1, 2025, even a first refusal is a crime under section 316.1939, Florida Statutes: a first refusal is a second-degree misdemeanor, and a refusal after a prior refusal suspension is a first-degree misdemeanor. Our post on Trenton’s Law and Florida’s 2025 DUI penalties explains that change, and our post on whether police can take your blood without a warrant in Florida covers blood draws. Every one of these decisions has consequences, which is why The Brancato Law Firm reviews exactly what the officer said and when.

What should you do in the first 10 days after a drug DUI arrest?

Act within 10 days, because that is the deadline to request review of the license suspension under section 322.2615, Florida Statutes. The early weeks also decide whether the evidence needed to challenge the DRE is still available.

Do not discuss what you took, or when, with anyone other than your lawyer. Our post on how to protect your driver’s license after a DUI arrest in Florida walks through the administrative side, and The Brancato Law Firm can file the review request for you.

Frequently asked questions about drug recognition experts in Florida

Can a DRE tell what drug I took without a blood or urine test?

No. A DRE offers an opinion about a drug category based on physical signs, and only a laboratory test can identify a specific substance. The Brancato Law Firm compares the DRE’s predicted category against the lab report in every case, because a mismatch can undercut the opinion.

Is a drug recognition expert a doctor or medical expert?

No. A DRE is a police officer who completed about 72 hours of classroom training and at least 12 supervised evaluations. At The Brancato Law Firm, we use that training record to show jurors the limits of what the officer is qualified to say, a point Judge Cope made in his partial dissent in Williams v. State, 710 So. 2d 24 (Fla. 3d DCA 1998).

Can I get a DUI in Florida for taking my legal prescription?

Yes. Florida’s DUI statute covers any controlled substance under chapter 893 when it impairs your normal faculties, and a valid prescription is not a defense by itself. Our attorneys at The Brancato Law Firm focus on whether the State can prove actual impairment, as explained in our post on DUI for prescription drugs in Florida.

Does a positive THC test prove I was impaired while driving?

No. Florida courts allow evidence that THC was present, but the State must still prove your normal faculties were impaired at the time you drove. The Brancato Law Firm challenges the gap between a positive test and real impairment, which we cover in our post on driving after using medical marijuana.

Can DRE testimony be excluded in Florida?

It can be excluded or limited when the State cannot lay a proper foundation or when the opinion fails the reliability test in section 90.702. When a DRE is the State’s key witness, The Brancato Law Firm files the motions that test that foundation, and our page on defending DUI charges in Tampa describes the process.

Do I have to answer the DRE’s questions about drug use?

No. You have the right to remain silent, and after an arrest, questions about drug use fall under the custodial interrogation rule the Florida Supreme Court applied in Allred v. State, 622 So. 2d 984 (Fla. 1993). If you already answered, our attorneys at The Brancato Law Firm review the video to see whether those statements can be suppressed.

Can a drug DUI charge be reduced or dropped in Florida?

Yes, it can, depending on the evidence. The Brancato Law Firm looks early for errors in the DRE evaluation, a toxicology report that contradicts the officer, and grounds for a motion to exclude, any of which can lead prosecutors to reduce or drop a charge, though no outcome is guaranteed. Our post on how to fight a DUI charge in Hillsborough County explains the process.

For how The Brancato Law Firm, P.A. defends these cases, see our Tampa drug crimes defense practice.

Talk to a Tampa DUI defense attorney about your DRE case

For more about our defense strategies, visit our Tampa DUI Lawyer page.

Ten days is all Florida allows to challenge a license suspension after a DUI arrest, and the DRE’s records and video are easiest to secure early. Call The Brancato Law Firm, P.A., founded by Tampa Criminal Defense Attorney Rocky Brancato, at (813) 727-7159. Our attorneys will start by requesting the evaluation, the video, and the toxicology report.

The Brancato Law Firm, P.A.
620 E. Twiggs Street, Suite 205, Tampa, FL 33602
(813) 727-7159
Serving Hillsborough, Pinellas, and Pasco Counties

The Brancato Law Firm, P.A. is a Tampa-based criminal defense practice. We are not affiliated with any other Brancato-named law firms.