Yes. In South Carolina, you can be charged with DUI after taking prescription medication if the medication materially and appreciably impairs your ability to drive. The key issue is not whether the drug was prescribed legally. The issue is whether the substance affected your driving faculties to the degree required by South Carolina law.
McCutchen Vaught Geddie & Hucks, P.A. represents people facing DUI allegations in Myrtle Beach and across South Carolina, including cases involving prescription drugs, over-the-counter medications, alcohol, or a combination of substances. A valid prescription can explain why a medication was in your system, but it does not automatically prevent a DUI charge.
Can Prescription Medication Lead to a DUI in South Carolina? 
South Carolina DUI law applies to more than alcohol. S.C. Code § 56-5-2930 makes it unlawful to drive while under the influence of alcohol, another drug, a combination of drugs, or alcohol combined with drugs when the substance causes your driving faculties to become materially and appreciably impaired.
That language can apply to medication that you lawfully obtained with a prescription. You do not have to be accused of taking an illegal drug to face a DUI charge.
If an officer believes a prescription medication affected your alertness, coordination, judgment, reaction time, balance, or another ability needed to drive safely, the officer may investigate the situation as a possible drug-related DUI.
South Carolina Code Title 56, Chapter 5:
https://www.scstatehouse.gov/code/t56c005.php
For a broader explanation of the state’s DUI framework, review:
https://lawyersatthebeach.com/blog/understanding-south-carolina-dui-laws-what-you-need-to-know-if-charged/
A Valid Prescription Does Not Automatically Make Driving Safe
Taking medication exactly as prescribed does not automatically protect you from a DUI charge.
A valid prescription can be relevant evidence because it may show that you lawfully possessed the medication and took it for a legitimate medical reason. The central DUI question is still impairment. The State generally must prove that the drug or combination of substances affected your driving faculties to the degree required by South Carolina law.
Medications can affect different people in different ways. Your reaction can also change when:
- You begin taking a new medication
• Your dosage changes
• You take more than one medication
• You combine medication with alcohol
• You take medication without enough sleep or food
• Your medical condition affects how your body responds
Common categories of medication that may affect driving include:
- Sleep medications and sedatives
• Certain anti-anxiety medications
• Prescription pain medications
• Muscle relaxants
• Some seizure medications
• Certain antihistamines and other medications that cause drowsiness
Medication labels, prescribing information, and pharmacist warnings may advise you not to drive until you know how the medication affects you.
A lawful prescription may explain why a medication was present, but a South Carolina DUI case still focuses on whether your driving faculties were materially and appreciably impaired.
What Police May Look for During a Prescription Drug DUI Investigation
Drug-related DUI investigations can look different from alcohol-related DUI investigations. There may be no strong smell of alcohol and no breath test showing an unlawful alcohol concentration. An officer may rely on driving behavior, physical observations, statements, video, and chemical testing.
Police may consider:
- The reason for the traffic stop
• Lane position, speed, braking, or other driving behavior
• Speech, coordination, balance, eye appearance, and responsiveness
• Performance on field sobriety exercises
• Statements about medications or recent doses
• Prescription containers found in the vehicle
• Patrol-car or body-worn camera video
• Breath, blood, or urine test results
• Evidence of alcohol combined with medication
South Carolina’s implied consent law, S.C. Code § 56-5-2950, addresses chemical testing following an arrest for certain alcohol- or drug-related driving offenses. When an officer has reasonable suspicion that drugs other than alcohol, or a combination of alcohol and drugs, caused impairment, the statute allows the officer to order a urine sample.
The statute also addresses blood testing in certain circumstances, including when a person is physically unable to provide an acceptable breath sample for a recognized medical or physical reason.
A test showing that a medication was present does not necessarily answer the separate question of whether the medication materially and appreciably impaired your driving at the relevant time. That distinction can become a major issue in the defense of a prescription medication DUI case.
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Can You Be Charged With DUI Even With a Zero Breath Test?
Yes. A breath test primarily measures alcohol concentration. You may register little or no alcohol and still face a DUI investigation if an officer believes another drug caused impairment.
For example, imagine that you take a prescribed sleep medication late at night and drive early the next morning in Myrtle Beach. An officer stops you after observing unusual lane movement and believes you appear drowsy. A breath test shows no alcohol. If the officer suspects that medication is affecting your ability to drive, the investigation may shift toward a drug-related DUI and possible bodily-fluid testing.
A zero breath test does not automatically prove or disprove a drug-related DUI allegation. The prosecution still must establish the elements of the offense. The timing of the medication, the officer’s observations, available video, medical information, test reliability, and other facts may all matter.
What Evidence Can Be Challenged in a Prescription Medication DUI Case?
A DUI charge is an accusation, not a conviction. Prescription medication cases can raise factual, scientific, and procedural issues that deserve close review.
A defense attorney may examine whether:
- The traffic stop was legally justified
• The arrest was supported by sufficient evidence
• Field sobriety exercises were administered and interpreted fairly
• Video evidence matches the officer’s written report
• A medical condition could explain balance, speech, fatigue, or coordination issues
• The medication detected was capable of causing the alleged effects
• The timing of the dose matches the time of driving
• Blood or urine samples were properly collected, stored, and tested
• The State can connect the presence of a medication to actual driving impairment
• Required DUI testing and recording procedures were followed
Your defense strategy depends on the evidence in your individual case. A positive drug test does not automatically resolve every factual or legal issue.
For practical information about protecting your rights after an arrest, review:
https://lawyersatthebeach.com/blog/what-to-do-if-youve-been-arrested-in-south-carolina-a-step-by-step-guide/
What Should You Do After a Prescription Drug DUI Arrest?
The period after a DUI arrest can be confusing, especially when the medication involved was prescribed by a doctor. You can take practical steps to preserve information that may later matter.
Consider keeping and preserving:
- The original prescription bottle
• Pharmacy paperwork
• Dosage instructions
• Written medication warnings
• Records showing when the prescription was filled
• Receipts or records that help establish your timeline
• Relevant text messages or location data that already exist
Write down when you took the medication, how much you took, when you ate, whether you consumed alcohol, and when you began driving. Preserve the information rather than altering, discarding, or replacing records.
Avoid posting details about the arrest on social media. If police or investigators request additional statements after the arrest, consider speaking with a criminal defense attorney before giving a detailed account.
If this is your first DUI allegation, review:
https://lawyersatthebeach.com/blog/first-time-dui-charges-in-south-carolina-what-are-your-options/
What Are the Possible Consequences of a Drug-Related DUI?
A prescription medication DUI is still a DUI charge under South Carolina law. Depending on the circumstances and your prior record, a conviction may involve:
- Fines
• Jail exposure
• Driver’s license consequences
• Alcohol and Drug Safety Action Program requirements
• Ignition interlock requirements in applicable cases
• Increased insurance costs
• A criminal record
Prior DUI-related convictions can increase the seriousness of later charges. A collision involving injury or death can create far more serious legal exposure.
For a fuller discussion of DUI penalties and related consequences, review:
https://lawyersatthebeach.com/blog/the-consequences-of-a-dui-in-south-carolina-and-how-to-fight-the-charges/
How a Myrtle Beach DUI Attorney Can Help
A Myrtle Beach DUI attorney can evaluate more than whether a medication appeared in a test result. Your attorney may need to review traffic-stop video, chemical testing records, medical information, prescription history, witness statements, and the timeline between taking the medication and driving.
An attorney can also evaluate whether law enforcement followed South Carolina procedures and whether the available evidence supports the level of impairment required by law.
Depending on the facts, an attorney may examine:
- Whether the stop and arrest were lawful
• Whether testing procedures were followed
• Whether the medication level can be meaningfully connected to impairment
• Whether medical conditions affected the officer’s observations
• Whether video evidence supports or contradicts the written report
• Whether the prosecution can prove each required element
The goal is to identify weaknesses in the State’s case, preserve available defenses, and help you make informed decisions about what happens next.
More information about the firm’s Myrtle Beach DUI practice is available at:
https://lawyersatthebeach.com/myrtle-beach-dui-attorneys/
Speak With a Myrtle Beach DUI Attorney
If you were charged with DUI after taking prescription medication in Myrtle Beach, a lawful prescription does not make the case automatic in either direction. The State still must prove the required elements of the offense, including the legally required level of impairment.
McCutchen Vaught Geddie & Hucks, P.A. can review the circumstances of your arrest, explain your options, and help you understand the next steps. The firm offers free consultations for DUI and criminal defense matters.
Call (843) 277-1667 for a free consultation:
tel:+18432771667
Contact the firm:
https://lawyersatthebeach.com/contact-us/
The firm serves clients in Myrtle Beach, South Carolina, and nearby areas.
This article is for informational purposes only and is not legal advice. Consult an attorney about your specific situation.
