West Virginia DUI Statutes and Drug Impairment 
Under West Virginia Code §17C-5-2, a driver can be charged with DUI if their ability to drive is impaired by alcohol, illegal drugs, prescription medications, or over-the-counter substances. Law enforcement officers do not need to prove that a substance is illegal or consumed in excessive amounts; they must demonstrate that the driver’s capacity to control the vehicle was reduced. First-generation antihistamines, such as diphenhydramine (Benadryl) and chlorpheniramine, are particularly concerning because they can cause drowsiness, blurred vision, and slowed reaction times. Even non-sedating second-generation antihistamines may still impact judgment, especially when combined with other medications or alcohol. Medications That Can Contribute to DUI Charges
Allergy medications vary widely in their potential to impair driving. First-generation antihistamines are well-known for causing sedation and cognitive slowing. Many prescription antihistamines can also have sedating effects, even when used as directed. Additionally, combination medications for allergies, colds, or sinus congestion often contain multiple active ingredients, including decongestants, which may elevate heart rate or cause jitteriness, and alcohol, which can amplify sedative effects. Nasal sprays and other topical treatments are generally less impairing but can still impact alertness if misused or combined with other medications. It is essential for drivers to read labels, understand potential side effects, and consult with a healthcare professional regarding safe usage before driving.
Harley Wagner
Defending West Virginia Residents for over 24 Years
How Law Enforcement Evaluates Impairment
When a driver is suspected of impairment in West Virginia, officers may rely on observable behaviors and field sobriety tests rather than specific blood levels for allergy medications. Officers typically assess:- Coordination and balance, such as during the walk-and-turn or one-leg stand tests.
- Reaction times and motor skills.
- Speech patterns and overall alertness.
- Driving behavior, including lane maintenance, speed, and response to traffic signals.
The Role of Medical Documentation
Possessing a prescription or taking medication according to a doctor’s instructions can support a defense but does not automatically prevent DUI charges. Documentation can include the prescription, dosing schedule, and physician notes on the expected effects. Providing accurate records early in the legal process helps an attorney build a case, showing that the driver was following medical guidance. In some cases, expert witnesses such as toxicologists or pharmacologists may testify to how a specific drug affects a driver’s abilities, providing context for both the defense and the prosecution.
Harley and Heather gave me peace of mind as they walked me through the process of my DUI. Heather was so quick to answer even the smallest and probably irrelevant questions I had. I was extremely nervous to walk in the courtroom, but Harley made sure I was in and out of there in no time with the best deal I could think of. My DUI charge was reduced to a speeding ticket and some online DUI classes. Would absolutely recommend Harley and Heather if you’re ever in need of a lawyer.”
- Antea Jarazi
The Wagner Law Firm was amazing from beginning to end dealing with my case. This was my first time ever dealing with anything like this and they helped me tremendously and answered all my questions super fast. We got the best outcome possible for my case and I will be recommending Harley and Heather to anyone that’s ever in my situation."
- Savanna Cummings
Harley and Heather do not stop and are excellent at always keeping their clients up to date on the status of their case and never left wondering. They do all the work and are very well connected throughout the state. I will forever be grateful to both Harley and Heather for what they did for me,,,, they aren’t just another law firm, they are great people who truly care. Thank you."
- Clint Anderson
Preventing DUI Risk While Using Allergy Medications
Drivers can take proactive steps to reduce the risk of impairment:- Avoid operating a vehicle if the medication carries warnings about drowsiness or cognitive impairment.
- Consider non-impairing alternatives, such as second-generation antihistamines or non-sedating treatments.
- Schedule travel for times when you are least affected by symptoms or medications.
- Combine the use of public transportation, ride-sharing, or a designated driver during peak allergy season.
Defending Against a DUI Charge Linked to Allergy Medications
If you are charged with a DUI where allergy medications may have played a role, immediate legal guidance is critical. The Wagner Law Firm has extensive experience handling drug-related DUI cases in West Virginia and can help you navigate the complexities of the legal system. Defense strategies may include:- Demonstrating that medication was taken exactly as prescribed and did not contribute to impairment.
- Presenting medical and expert testimony to contextualize observed behavior.
- Challenging the accuracy or administration of field sobriety tests.
- Negotiating alternative resolutions or lesser charges when appropriate.
Related Videos
What are the penalties for a DUI conviction?
What happens if I'm arrested for a first DUI?