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DUI: alcohol only or drugs too?

On Behalf of | Dec 31, 2025 | Drunk Driving Accidents

When you hear DUI, you may immediately think of alcohol. Many people assume that if you haven’t consumed alcohol, you cannot be charged. However, impaired driving laws are broader than just alcohol consumption. States across the U.S. recognize that drugs, whether prescription, over-the-counter or illegal, can also impair your ability to drive safely. 

A driving under the influence charge does not rely solely on your blood alcohol content. If your driving ability is impaired by substances other than alcohol, you may still face serious legal consequences. 

How DUI charges can involve more than alcohol 

Understanding the scope of what constitutes impaired driving is essential to protecting your rights and staying informed about the law. 

  • Alcohol impairment: Blood alcohol concentration (BAC) is the most common measure. A BAC above the set legal limit leads to a DUI charge. Alcohol impairs coordination, judgment and reaction time, leading to dangerous driving.
  • Illegal drugs: Substances such as marijuana, cocaine or methamphetamine can impair motor skills, focus and decision-making. Even tiny amounts can result in an arrest, especially if your driving is noticeably affected.
  • Prescription and over-the-counter medications: There are medications that can cause dizziness, slowed reaction times or blurred vision. If these effects impair driving, you could face a DUI charge even if the drugs were legally prescribed.
  • Combination of substances: Alcohol combined with drugs can intensify impairment. Law enforcement can charge you based on the combined effects, regardless of the BAC alone.

Police officers may use field sobriety tests, blood tests or other assessments to determine impairment. A DUI can be based on performance and visual impairment, not only the presence of alcohol.

Even if you are confident that you were careful on the road, charges can still arise from impairment caused by substances other than alcohol. In situations like this, having legal guidance and support can help ensure you explore your options with experienced help.