DWI Cases Involving Prescription Drugs in Texas

DWI Cases Involving Prescription Drugs in Texas

Driving while intoxicated (DWI) cases in Texas often conjure images of alcohol-induced recklessness. However, an increasing number of DWI charges involve prescription drugs. This shift poses unique challenges and considerations for law enforcement, legal professionals, and the public. In this article, we explore the intricacies of DWI cases involving prescription drugs in Texas, highlighting legal definitions, enforcement strategies, and the implications for those charged.

The Legal Framework of DWI in Texas
In Texas, a person commits a DWI offense if they are found operating a motor vehicle in a public place while intoxicated. Under Texas Penal Code § 49.01, "intoxicated" is defined as:
  • Having an alcohol concentration of 0.08 or more.
  • Not having the normal use of mental or physical faculties due to the use of alcohol or other drugs.

Prescription Drugs and DWI
While alcohol-related DWI cases are straightforward due to measurable blood alcohol concentration (BAC) levels, prescription drugs complicate matters. Many legally prescribed medications can impair a person's ability to drive safely, even when taken as directed. This impairment can form the basis for a DWI charge if it is proven that the driver was not in control of their vehicle due to the medication's effects.

Common prescription drugs implicated in DWI cases include:
  • Marijuana
  • Opioids (e.g., oxycodone, hydrocodone)
  • Benzodiazepines (e.g., Xanax, Valium)
  • Stimulants (e.g., Adderall, Ritalin)
  • Sleep Aids (e.g., Ambien, Lunesta)
  • Antidepressants (e.g., Zoloft, Prozac)
  • Enforcement and Detection
Detecting impairment from prescription drugs is more challenging than detecting alcohol intoxication. There is no breathalyzer for drugs, and symptoms of drug impairment can vary widely depending on the substance and the individual's reaction. Consequently, law enforcement officers must rely on other methods to identify impaired drivers, including:

Field Sobriety Tests (FSTs)
Field sobriety tests are standardized tests used to determine if a driver is impaired. These tests include:
  • Horizontal Gaze Nystagmus (HGN): Observing the eyes for involuntary movements.
  • Walk and Turn (WAT): Assessing balance and ability to follow instructions.
  • One Leg Stand (OLS): Evaluating balance and physical control.
While these tests are primarily designed to detect alcohol impairment, they can also indicate impairment by prescription drugs.

Drug Recognition Experts (DREs)
Some officers undergo specialized training to become Drug Recognition Experts. DREs use a 12-step evaluation process to identify the type of drug causing impairment. This process includes:
  • A preliminary breath test to rule out alcohol.
  • An interview with the arresting officer.
  • Examination of the subject’s vital signs and physical characteristics.
  • Administration of psychophysical tests.
  • A toxicological examination.

Legal Defense Strategies
Given the complexities involved in DWI cases with prescription drugs, mounting a defense requires a nuanced approach. Common defense strategies include:

Challenging the Traffic Stop
A key component in any DWI case is the legality of the traffic stop. The defense can argue that the officer lacked reasonable suspicion or probable cause to initiate the stop, potentially leading to the exclusion of evidence obtained thereafter.

Questioning Field Sobriety Tests
The reliability of FSTs in detecting drug impairment can be contested. These tests are designed for alcohol impairment, and their applicability to prescription drugs can be questioned. Furthermore, various medical conditions and factors unrelated to intoxication can affect test performance.

Valid Prescription Defense
A valid prescription defense argues that the defendant was taking medication as prescribed by a doctor. While this does not negate impairment, it can influence the court’s perception and potentially mitigate penalties.

Scientific Evidence
Toxicology reports and expert testimony can be pivotal. A defense attorney might challenge the accuracy of toxicology results, the methods used to obtain them, or the interpretation of these results. For instance, the presence of a drug in the bloodstream does not necessarily indicate impairment at the time of driving.

Consequences of a DWI Conviction
The consequences of a DWI conviction in Texas are severe and can include:

Criminal Penalties

  • First Offense: Up to 180 days in jail, fines up to $2,000, and license suspension for up to one year.
  • Second Offense: Up to one year in jail, fines up to $4,000, and license suspension for up to two years.
  • Third Offense: Up to 10 years in prison, fines up to $10,000, and license suspension for up to two years.


Administrative Penalties
The Texas Department of Public Safety (DPS) imposes administrative penalties separate from criminal court proceedings, such as license suspension and surcharges.

  • Additional Consequences
  • Increased auto insurance rates.
  • Mandatory attendance in alcohol and drug education programs.
  • Installation of an ignition interlock device.
  • Employment and educational repercussions.


Public Health and Policy Implications
The rise in DWI cases involving prescription drugs has broader public health and policy implications. As the use of prescription medications increases, so does the potential for impaired driving. Addressing this issue requires a multi-faceted approach:

Education and Awareness
Public awareness campaigns can educate drivers about the risks associated with driving while on prescription medications. Patients should be informed about their medications' potential side effects and advised to consult with their healthcare providers regarding their ability to drive safely.

Policy and Legislation
Legislative measures can help address the growing concern of drug-impaired driving. This might include stricter regulations for prescription medications with high impairment potential, mandatory labeling, and stronger penalties for impaired driving.

Healthcare Provider Role
Healthcare providers play a critical role by advising patients on the risks of driving while on certain medications. They can offer guidance on alternative treatments with fewer side effects and monitor patients for signs of impairment.

DWI cases involving prescription drugs in Texas present a complex legal landscape. Unlike alcohol-related DWIs, these cases require careful consideration of the type of drug, its effects on the individual, and the circumstances of its use. For those facing such charges, understanding their rights and the intricacies of the law is crucial.

As the prevalence of prescription drug use continues to rise, so too must our efforts to ensure road safety. Through education, policy reform, and responsible prescribing practices, we can better address the challenges posed by drug-impaired driving and safeguard our communities.

Navigating a DWI charge involving prescription drugs is daunting, but with the right legal support and understanding, individuals can better manage the implications and work towards favorable outcomes. Whether through defense strategies in court or proactive measures to prevent impairment, addressing this issue requires a comprehensive approach that balances legal, medical, and public health perspectives.

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