How Medical Conditions Can Lead to a False DWI Arrest

Driving While Intoxicated, or DWI (DUI), arrests are often based on what the police officer observes, field sobriety tests, and chemical testing. Though these methods are commonly used to make a DUI arrest, sometimes they are not accurate. In some cases, a person has a medical condition that can mimic DUI symptoms. Because of this, a false DUI arrest can be made, even if there were no alcohol or other substances in the person's system.

False DUI arrests and DUI charges can have very serious consequences, including marks on your criminal record, driver's license suspension, and damage to your reputation. Understanding how these medical conditions can look like intoxication is an important part of evaluating the circumstances around a DWI arrest.

In Texas, DWI cases are prosecuted under the laws enforced by the Texas Department of Public Safety and the state's criminal justice system. However, from a defense standpoint, there could be relevant medical conditions that contributed to the arrest and possible charges.

Keep reading to learn more about how medical conditions can lead to a false DWI arrest.

How Police Determine Suspected Intoxication for a DUI Stop

When a police officer suspects drunk driving, the often rely on a number of factors to determine if a person is over the legal limit and actually driving while intoxicated. These include:

• Erratic driving behavior

• The smell of alcohol

• Slurred speech

• Bloodshot or glassy eyes

• Poor balance or coordination

• Confusion or slow responses

  
  

If a police officer notices these signs, they often will ask the driver to do a field sobriety test or a breathalyzer test or blood test. These tests are meant to measure impaired driving, but there are physical and mental health conditions that can produce symptoms that are similar to intoxication.

When medical issues are mistaken for impairment, an innocent person could be facing an arrest and charges. Sparks Law Firm can also answer questions like Is not speaking English a defense for a DWI in Texas?

Medical Conditions That Can Lead to False DUI Arrests

Diabetes and Hypoglycemia

One of the most common conditions that make law enforcement officers believe a person is intoxicated is diabetes. This is especially true when blood sugar levels drop dangerously low.

Diabetes and hypoglycemia offer when a person's blood sugar levels fall below what's considered to be normal. Low blood sugar can cause:

• Slurred speech

• Confusion or disorientation

• Poor coordination

• Dizziness

• Difficulty concentrating

• Unusual behavior

  
  

A person who has low blood sugar might seem intoxicated, even if there is no alcohol in their system. In some cases, the person may also have a complication of diabetes known as diabetic ketoacidosis, which causes the breath to smell fruity or fermented, like alcohol.

Neurological Conditions

There are also certain neurological disorders that can affect balance, speech, and coordination, which are also things that law enforcement look for.

Examples of these conditions are:

• Epilepsy or seizure disorders

• Multiple sclerosis

• Parkinson’s disease

• Traumatic brain injuries

• Migraines with neurological symptoms

  
  

Inner Ear Disorders and Balance Problems

Many field sobriety tests rely on balance and coordination. However, a person with an inner ear disorder may have chronic balance issues, which make the tests difficult, if not impossible, to pass. Some of these disorders include:

• Vertigo

• Meniere’s disease

• Labyrinthitis

• Vestibular disorders

  
  

Drivers with these conditions may appear unsteady when standing or walking, even when they are completely sober.

Fatigue and Sleep Disorders

Extreme fatigue can also mimic DUI symptoms. Drivers may have slow reaction times, poor coordinations, and a difficult time focusing.

Common sleep-related issues that may produce symptoms that look like intoxication include:

• Sleep apnea

• Narcolepsy

• Severe sleep deprivation

  
  

Someone suffering from extreme fatigue may display physical and mental symptoms that resemble alcohol impairment. In some cases, drivers may even struggle to stay awake or maintain focus during roadside questioning.

Prescription Medications

Many prescription medications can affect the nervous system and produce side effects similar to intoxication.

Certain medications may cause:

• Drowsiness

• Slurred speech

• Impaired coordination

• Confusion

• Delayed reaction times

  
  

Even when medications are taken exactly as prescribed, these side effects can lead officers to believe a driver is impaired.

Common categories of medications that may affect driving ability include:

• Anti-anxiety medications

• Pain medications

• Muscle relaxants

• Sleep aids

• Antihistamines

  
  

In some situations, a driver may test negative for alcohol but still appear impaired due to medication side effects. This can create confusion during a DWI investigation.

Medical Conditions and Breath Test Results

In addition to physical symptoms, certain medical conditions can interfere with breath testing equipment and trigger false positives.

Breathalyzer devices measure alcohol concentration in a person’s breath. However, some medical conditions can produce substances that the device may interpret as alcohol.

For example, individuals with diabetes may produce acetone in their breath when blood sugar levels are extremely high or low. Acetone is chemically similar to alcohol and may potentially affect certain breath testing devices.

Conditions such as acid reflux or gastroesophageal reflux disease (GERD) can also cause alcohol vapors from the stomach to travel into the mouth, which may lead to inaccurate breath test readings.

Although modern breath testing technology has improved, these medical factors may still raise questions about the reliability of test results.

Why Field Sobriety Tests Are Not Always Reliable

Field sobriety tests are often used as a key piece of evidence in DWI investigations. However, these tests are not foolproof.

Several factors can influence a person’s performance on these tests, including:

• Medical conditions

• Age

• Physical disabilities

• Weather conditions

• Uneven road surfaces

• Nervousness or anxiety

Because the tests rely heavily on physical coordination and balance, individuals with medical limitations may struggle even when they are completely sober.

This makes it important to carefully evaluate the circumstances surrounding any DWI arrest.

The Role of Medical Evidence in DWI Defense

When a medical condition contributed to a DWI arrest, medical evidence can play an important role in a legal defense.

This evidence may include:

• Medical records documenting the condition

• Physician testimony regarding symptoms and limitations

• Prescription medication records

• Expert analysis of breath or blood test results

In some cases, this evidence may help explain why a driver displayed symptoms that were mistakenly interpreted as intoxication, and a medical defense is very valid.

A detailed investigation into medical history and health conditions can reveal alternative explanations for the behaviors observed by law enforcement. For more information, skilled criminal defense lawyers in Fort Worth TX may be able to help.

Why Legal Representation Matters in DWI Cases

False DWI arrests can have significant legal consequences. Even if charges are eventually dismissed, the process can be stressful and damaging to a person’s reputation.

An experienced DWI defense attorney may assist individuals by:

• Reviewing police reports and arrest procedures

• Examining field sobriety test administration

• Investigating potential medical explanations

• Challenging breath or blood test accuracy

• Presenting medical evidence in court

Every DWI case is unique, and medical conditions may play a critical role in determining whether a driver was actually impaired.

For individuals facing DWI charges in Fort Worth or elsewhere in Texas, understanding how medical conditions can influence the outcome of a case may be an important step in protecting their rights and building a strong legal defense.

Sparks Law Firm is available for those who need a DUI attorney and who may have received false DUI charges. The firm can retain medical experts, offer medical documentation, and find expert testimony to support wrongful arrests due to medical conditions. Reach out today for a free consultation.