Being stopped for suspected impaired driving is a stressful situation. Officers look for signs like slurred speech, unsteady balance, or unusual behavior. But these same signs do not come from alcohol or drugs every time. Sometimes, a medical condition can look a lot like impairment.
How certain conditions affect speech and movement
Diabetes, epilepsy, and neurological disorders can all cause physical signs that resemble intoxication. Low blood sugar may lead to confusion, clumsiness, or slurred words. A seizure disorder can leave someone disoriented or shaky afterward. Even multiple sclerosis or Parkinson’s disease may affect coordination, making walking in a straight line difficult.
Why medications may complicate testing
Many prescription medications include side effects such as dizziness, fatigue, or slow response times. Antihistamines, blood pressure drugs, or antidepressants can sometimes create symptoms that appear similar to impairment during field tests. This can complicate roadside evaluations when an officer assumes the behavior stems from alcohol.
The limits of field sobriety tests
Field sobriety tests often depend on balance, eye movement, and concentration. These are the same areas that many health conditions can influence. For example, a person with inner ear problems may struggle to stand on one leg or walk heel-to-toe even without drinking. Migraine sufferers may also show unusual eye movements or sensitivity to light, which officers could mistake as signs of intoxication.
Why accurate assessment matters
When a driver shows signs of impairment, it is important to consider all possible explanations. A medical condition or prescribed medication can present clear, physical signs that resemble alcohol or drug use. Understanding this reality helps highlight the importance of looking beyond assumptions during an OWI stop.
Medical conditions can complicate traffic stops in unexpected ways. Staying aware of these possibilities encourages fairness in how impairment is evaluated and reminds everyone that what looks like intoxication may be something else entirely.
