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Can You Get a DWI for Driving After Taking Prescription Medication?

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Can You Get a DWI for Driving After Taking Prescription Medication?

Can You Get a DWI for Driving After Taking Prescription Medication?

Getting pulled over is stressful enough. But being told you may face a DWI charge when you have done nothing more than take your prescribed medication as directed? That confusion and fear can feel like the ground shifting beneath your feet. You followed your doctor’s orders. You did everything right. And still, you find yourself on the side of the road, unsure of your rights and what comes next.

As an attorney with more than two decades of criminal defense experience in Jefferson City, Missouri, I, Scott A. Hamblin, have worked with clients in exactly this situation. The law here is not always straightforward, and the consequences of a medication-related DWI charge can be serious. Here is what Missouri drivers need to know.

  • You can be charged with a DWI (Driving While Intoxicated) for operating a vehicle under the influence of prescription medication.
  • Prescription medications that impair your ability to drive safely, even if taken as directed, can lead to a DWI charge.
  • Missouri law does not differentiate between impairment caused by alcohol, illegal drugs, or legal prescription medications.
  • Officers may evaluate your driving behavior, physical condition, and responses during field sobriety tests to determine impairment.
  • Defenses against these charges often focus on proving that your driving was not impaired or that the medication did not cause impairment.
  • It is important to consult an experienced attorney if facing a medication-related DWI to understand your legal options and rights under Missouri law.

Can a Valid Prescription Still Lead to a DWI Charge?

Many people assume that a valid prescription protects them from a DWI charge. It does not. Under Missouri law, you can be charged with driving while intoxicated if any substance, including a legally prescribed drug, impairs your ability to operate a vehicle safely. The law does not ask whether your medication was lawful. It asks whether it affected your driving.

This matters for a wide range of commonly prescribed drugs, including:

  • Opioids, which are used for pain relief but can cause drowsiness and slow reaction time
  • Benzodiazepines, which are prescribed for anxiety or sleep disorders and may impair coordination
  • Muscle relaxants, which treat chronic pain but can reduce alertness and reflexes

Even medications that seem mild can become problematic when combined with alcohol or other substances.

What Police May Use to Claim a Driver Was Impaired by Medication

Missouri law enforcement officers receive training to detect impairment that goes beyond alcohol. In some cases, an officer trained as a Drug Recognition Expert (DRE) may conduct a structured 12-step evaluation to assess whether a driver is impaired and by what substance.

During a traffic stop, an officer may note:

  • Slowed reaction time or drowsiness
  • Unusual pupil size or eye movement irregularities
  • Abnormal muscle tone, heart rate, or blood pressure
  • Poor performance on standardized field sobriety tests
  • Admissions or visible evidence of medication use

Following this evaluation, the officer may request a blood, urine, or saliva test. A positive result for a prescription drug can, and likely will, be used as evidence to support an impairment finding.

Does a Prescription Label or Doctor’s Instructions Protect You?

Not automatically. While having a valid prescription is relevant to your defense, it does not serve as a shield against a charge. What it can do is support your case. If you are charged with a medication-related DWI, documentation matters. Prescription records, pharmacy receipts, and physician’s notes can all help establish that you were using the medication lawfully and as directed.

A strong defense may also challenge whether the evidence of impairment holds up. Field sobriety tests, for example, must be administered properly to carry any weight in court. If the officer failed to follow correct procedures, those results may not be valid evidence of impairment. I work carefully to identify those weaknesses and build a strategy around them.

What Consequences Can Follow a Medication-Related DWI Allegation?

The consequences of a medication-related DWI in Missouri are the same as those for an alcohol-related DWI. Depending on your history and the circumstances of the stop, you could face:

  • Criminal charges, including fines and potential jail time
  • Suspension or revocation of your driver’s license
  • Mandatory treatment programs for repeat offenses
  • A permanent mark on your criminal record

These outcomes can affect your employment, your family, and your future. That is why how you respond in the hours and days after a charge matters as much as what happened during the stop itself.

Your Rights Are Worth Defending

A medication-related DWI charge does not have to define what comes next for you. Every case is different, and I treat each one that way. I listen carefully to your account of events, review the evidence, and work to give you an honest picture of your options, not just what you want to hear.

If you or someone you know is facing a DWI charge related to prescription medication in Jefferson City or the surrounding area, contact my office today to schedule a consultation. You deserve a defense built on experience, strategy, and a genuine commitment to your best outcome.

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