Drug-Related DUI (DUID) in Corpus Christi: Defending Against Impairment Charges Without Alcohol

A DUI does not always involve alcohol. In Texas, you can be charged with Driving Under the Influence of Drugs (DUID) if you operate a vehicle while impaired by any substance—prescription medication, over-the-counter drugs, marijuana, or illegal substances. Unlike alcohol-related DWI, where a breathalyzer provides a clear numerical limit, drug impairment cases rely heavily on officer observations, field sobriety tests, and drug recognition evaluations. In Corpus Christi and throughout the Coastal Belt, DUID charges are prosecuted aggressively, and the consequences can be just as severe as a DWI—jail time, license suspension, fines, and a permanent criminal record. When your freedom and your future are on the line, you need a defense attorney who understands the science of drug impairment and will fight to protect your rights.

At Barton & Associates, Attorneys at Law, we defend individuals throughout Corpus Christi and the Coastal Belt who are charged with drug-related DUI. Whether you were stopped on South Padre Island Drive, pulled over on Staples Street, or involved in an accident on the Crosstown Expressway, we provide the aggressive, knowledgeable representation you need to protect your license, your freedom, and your future. With extensive experience in the Nueces County criminal courts and a deep understanding of drug recognition evaluations, we guide our clients through every stage of the defense process.

Understanding Drug-Related DUI in Texas

Under Texas law, a person commits DUI if they operate a motor vehicle in a public place while intoxicated. “Intoxicated” means not having the normal use of mental or physical faculties due to the introduction of alcohol, a controlled substance, a drug, a dangerous drug, a combination of substances, or any other substance.

What Substances Can Lead to a DUID?

DUID can result from:

• Illegal drugs: Marijuana, cocaine, methamphetamine, heroin, ecstasy

• Prescription medications: Painkillers (hydrocodone, oxycodone), anti-anxiety medications (Xanax, Valium), stimulants (Adderall), sleep aids (Ambien)

• Over-the-counter medications: Cough syrup, antihistamines, sleep aids

• Combination of substances: Alcohol combined with drugs, or multiple drugs together

No BAC Limit

Unlike alcohol DWI, there is no numerical limit for drug impairment. A person can be charged with DUID even if they have a valid prescription for the medication. The issue is impairment—not the presence of the substance in your system.

How DUID Charges Arise in Corpus Christi

DUID charges in Corpus Christi typically arise from:

Traffic Stops

A routine traffic stop on South Padre Island Drive, Staples Street, or the Crosstown Expressway leads to a DUI investigation. The officer observes signs of impairment but does not smell alcohol. Further investigation reveals drug impairment.

Accidents

If you are involved in an accident, police will investigate. Signs of drug impairment may lead to DUID charges.

Checkpoints

DWI checkpoints throughout Corpus Christi can result in DUID charges if officers observe signs of drug impairment.

Drug Recognition Evaluations

If an officer suspects drug impairment, they may call a Drug Recognition Expert (DRE) to conduct a specialized evaluation.

Drug Recognition Evaluations (DRE)

When an officer suspects drug impairment, they may request a Drug Recognition Expert (DRE) to conduct a 12-step evaluation. The DRE is a specially trained officer who follows a standardized protocol to determine whether a person is impaired by drugs.

The 12-Step DRE Protocol

1. Breath alcohol test: To rule out alcohol as the sole cause

2. Interview with the arresting officer: To gather observations

3. Preliminary examination: To check for signs of impairment

4. Psychophysical tests: Modified field sobriety tests

5. Vital signs examination: Pulse, blood pressure, temperature

6. Darkroom examinations: Pupil size and reaction

7. Muscle tone examination: Checking for rigidity or flaccidity

8. Injection sites and tracking marks: Checking for signs of drug use

9. Interrogation of the suspect: Questions about drug use

10. Opinion of the evaluator: Whether the person is impaired and what category of drug is involved

11. Toxicology sample: Blood or urine sample for laboratory testing

12. Final report: Documentation of the evaluation

Field Sobriety Tests for Drug Impairment

The same field sobriety tests used for alcohol DWI are used for DUID:

Horizontal Gaze Nystagmus (HGN)

The officer checks for involuntary jerking of the eyes. Certain drugs (depressants, inhalants, dissociative anesthetics) affect HGN; others (stimulants, narcotic analgesics, cannabis) do not.

Walk-and-Turn

This test measures balance, coordination, and the ability to follow instructions. It can be affected by many drugs.

One-Leg Stand

This test measures balance and coordination. It can be affected by many drugs.

Chemical Testing for Drugs

After arrest, you will be asked to provide a blood or urine sample:

Blood Testing

Blood tests can detect the presence of drugs in your system. However, the presence of a drug does not necessarily mean you were impaired at the time of driving. Drugs can remain in the bloodstream long after their impairing effects have worn off.

Urine Testing

Urine tests can detect drug metabolites for days or weeks after use. A positive urine test does not prove impairment at the time of driving.

Defending Against DUID Charges

A strong defense can mean the difference between a conviction and an acquittal. Common defense strategies include:

Challenging the Traffic Stop

The officer must have reasonable suspicion to stop your vehicle. If the stop was illegal, all evidence from the stop may be suppressed.

Challenging Field Sobriety Tests

Field sobriety tests are not always reliable. Your attorney may challenge:

• Whether the tests were administered properly

• Whether the officer was properly trained

• Whether physical or medical conditions affected your performance

Challenging the Drug Recognition Evaluation

The DRE protocol is complex and subject to error. Your attorney may challenge:

• Whether the DRE was properly certified

• Whether the 12-step protocol was followed correctly

• Whether the DRE’s opinions are supported by the evidence

• Whether there are alternative explanations for the observed signs

Challenging the Chemical Test

Your attorney may challenge:

• Whether the blood was properly drawn

• Whether the chain of custody was maintained

• Whether the sample was properly stored

• Whether the test results are accurate

• Whether the presence of a drug proves impairment

Prescription Medication Defense

If you have a valid prescription for the medication, your attorney may argue that:

• You were using the medication as prescribed

• You were not impaired despite the presence of the drug

• The officer’s observations were caused by something other than impairment

Medical Conditions

Certain medical conditions can mimic signs of drug impairment, including:

• Diabetes

• Neurological disorders

• Head injuries

• Eye conditions

• Sleep disorders

Timing of Drug Use

Drugs can remain in the body long after their impairing effects have worn off. Your attorney may argue that:

• You used the drug days before driving

• The drug was not impairing you at the time of driving

• The presence of metabolites does not prove impairment

The Consequences of a DUID Conviction

A DUID conviction carries the same penalties as an alcohol DWI:

First Offense

• Class B misdemeanor (BAC below 0.15) or Class A misdemeanor (if aggravating factors)

• 3 to 180 days in jail

• Fine up to $2,000 (or $4,000 for Class A)

• Driver’s license suspension (90 days to 1 year)

• Annual surcharge of $1,000 for 3 years

• DWI education program

Second Offense

• Class A misdemeanor

• 30 days to 1 year in jail

• Fine up to $4,000

• Driver’s license suspension (180 days to 2 years)

• Annual surcharge of $1,500 for 3 years

• DWI intervention program

Third Offense

• Third-degree felony

• 2 to 10 years in prison

• Fine up to $10,000

• Driver’s license suspension (180 days to 2 years)

• Annual surcharge of $2,000 for 3 years

Frequently Asked Questions About Drug-Related DUI

What is DUID in Texas?

DUID (Driving Under the Influence of Drugs) occurs when a person operates a motor vehicle while impaired by any substance—illegal drugs, prescription medications, or over-the-counter drugs.

Can I get a DUID for taking prescription medication?

Yes. If a prescription medication impairs your ability to drive, you can be charged with DUID. Having a valid prescription is not a defense to impairment.

Is there a legal limit for drugs like there is for alcohol?

No. There is no numerical limit for drugs. The issue is whether you were impaired—not the amount of the drug in your system.

What is a Drug Recognition Expert (DRE)?

A Drug Recognition Expert is a specially trained officer who follows a 12-step protocol to determine whether a person is impaired by drugs and what category of drug is involved.

Can I refuse a blood test for a DUID?

You can refuse, but refusal carries consequences. Under Texas’s implied consent law, refusing a blood or urine test can result in automatic driver’s license suspension. Refusal can also be used against you in court.

How long do drugs stay in your system?

Drugs can remain in the body for varying periods. Marijuana metabolites can be detected for days or weeks. Prescription drugs can remain for days. The presence of a drug does not prove impairment at the time of driving.

Can I be charged with DUID if I have a medical marijuana card?

Yes. Marijuana remains illegal under federal law, and impairment from marijuana is still a DUID offense in Texas.

What is the penalty for a first DUID?

A first DUID carries the same penalties as a first DWI: up to 180 days in jail, a fine of up to $2,000, and license suspension.

Do I need an attorney for a DUID?

Yes. DUID cases are complex and rely heavily on officer observations and Drug Recognition Evaluations. An experienced DUID defense attorney can help you understand your rights, challenge the evidence, and protect your future.

What is the ALR hearing deadline?

You have only 15 days from the date of arrest to request an Administrative License Revocation (ALR) hearing. Failure to request the hearing results in automatic license suspension.

Why Barton & Associates Is the Right Choice for Your Defense

DUID cases are complex and rely heavily on officer observations, field sobriety tests, and Drug Recognition Evaluations. At Barton & Associates, Attorneys at Law, we have extensive experience defending individuals against DUID charges in the Nueces County criminal courts.

Our attorneys understand the science behind drug impairment, the flaws in the DRE protocol, and the strategies for challenging chemical test results. We work closely with our clients to investigate the facts, gather evidence, and develop a defense strategy tailored to the unique circumstances of each case.

We also understand that a DUID charge can be frightening. Our attorneys approach these cases with dedication, helping our clients navigate the legal system while protecting their rights, their license, and their future.

Protect Your License and Your Future Today

If you are charged with drug-related DUI in Corpus Christi, your license, your freedom, and your future are on the line. Do not wait. The decisions you make now will determine the outcome of your case.

Contact the experienced criminal defense attorneys at Barton & Associates today. Call us directly at 361-800-6780 to speak with a member of our team. You may also complete the Free Consultation form on our website, and we will reach out to you promptly. Please note that all on-site consultations at our Corpus Christi office are by appointment only, ensuring that we can give your case the focused attention it requires.

Reach out today—let us help you defend against DUID charges and protect your future.

Main Category: Criminal Defense Corpus Christi
Practice Area Category: DWI & Intoxication
Barton & Associates, Attorneys at Law
5110 Wilkinson Dr Suite 210, Corpus Christi, TX 78415
Office: 361-800-6780