Spring is beautiful in Charleston, but it comes with a price. The city’s infamous ‘Yellow Season’ usually coats everything in a thick layer of pollen. Hence, if you suffer from seasonal allergies, you likely reach for a prescription antihistamine just to get through your morning commute. However, that allergy pill you took before leaving home could potentially put you at risk for a driving under the influence (DUI) charge.
How can allergy pills affect driving?
That risk starts the moment the medication enters your system. Prescription allergy medications often cause drowsiness, brain fog and slower reaction times. These side effects may feel minor at first, but they can significantly reduce your ability to control a vehicle safely. With that, the law does not distinguish between legal and illegal substances when it comes to DUI charges. What matters is whether your medication affects your ability to drive.
What does driving impaired really mean?
That distinction then brings us to how South Carolina defines impairment. The state does not have to prove you were drunk to charge you with a DUI. Instead, the prosecution must prove that your medication materially and appreciably impaired your driving. If a legal medication, whether a prescription or an over-the-counter pill, makes you less capable of handling a vehicle than a sober person, the law still treats you as an impaired driver. This means that your allergy medication can fall under the same standard as alcohol.
Can having zero blood alcohol content protect you?
Given the standards of impairment mentioned above, a clean breath test may offer less protection than you think. If you blow 0.00% on a breathalyzer but still show signs of impairment, police can take action. Officers can request a chemical test to detect antihistamines or other medications in your system. Additionally, your behavior, speech and physical appearance all factor into an officer’s assessment. Hence, a zero blood alcohol reading does not automatically clear you of a DUI charge.
Protect your driving record in Charleston
This reality can feel alarming, especially when you were simply managing your allergies. The good news is that a charge does not have to define your future. South Carolina law carries many nuances and understanding your rights is the first step toward protecting yourself. With the right guidance, you can explore your options, challenge the evidence and make informed decisions. You do not have to face this alone and knowing where to turn can make all the difference for your driving record and peace of mind.

