If you’re pulled over, arrested, or even worried about a DUI in South Carolina, you’re not alone – and you’re not the first person to Google the exact questions below. South Carolina’s DUI laws are strict, technical, and full of details that most people don’t learn until it’s too late.

This guide breaks down the most common DUI questions we hear at Mastantuno Law Firm, answered in clear, practical language so you know what to expect – and how to protect yourself.

South Carolina DUI FAQ’s

Can You Get a DUI for Prescription or Over-the-Counter Medication?

Yes. Absolutely.
In South Carolina, DUI doesn’t require alcohol – only that a substance “materially and appreciably impairs” your ability to drive (S.C. Code §56-5-2930).

That means you can be charged with DUI if you’re impaired by:

• Prescription medications (painkillers, antidepressants, ADHD meds, anxiety meds, sleep meds)
  
• Over-the-counter drugs (Benadryl, NyQuil, cough syrup, allergy medications)
  
• Any substance that slows reaction time, causes drowsiness, or affects coordination
  

Even if the medication is legal and taken as prescribed, impairment = arrest.

Do I Have to Blow Into the Breathalyzer?

You can technically refuse – but the consequences start immediately.

Under South Carolina’s Implied Consent Law, refusing the breath test leads to:

• Automatic 6-month license suspension
  
• Mandatory IID (Ignition Interlock Device) to drive again
  
• Evidence of refusal used against you at trial
  

In many cases, refusing the breath test makes the situation harder, not easier.

Have You Been Charged with a DUI in South Carolina?

Contact Mastantuno Law Firm Today. We Provide Aggressive Representation for DUI Charges in South Carolina.

What Happens If My BAC Is Below 0.08%?

You can still be charged with DUI.

South Carolina law allows DUI charges at:

• 0.05 to 0.07 BAC if the officer believes you’re impaired
  
• Under 0.05 BAC with other evidence (poor driving, slurred speech, etc.)
  

0.08% is not the threshold for innocence – it’s the threshold for a legal inference of impairment.

Can Police Arrest Me Without Seeing Me Drive?

Yes. This is called “DUI by interpretation” or “DUI by circumstance.”

You can be arrested if:

• You were found in the driver’s seat
  
• The engine was warm
  
• Keys were in the ignition
  
• You admitted to driving
  
• A witness saw you driving earlier
  

This is extremely common in:

• Parking lots
  
• Driveways
  
• Accident scenes
  
• Bar/restaurant parking areas

Can You Get a DUI for Sleeping in Your Car?

Yes. The law looks at whether you were in actual physical control of the vehicle.

That means DUI can apply if:

• You’re asleep in the driver’s seat
  
• Keys are accessible
  
• Car is running (even for heat or AC)
  
• Car is in gear or “ready to drive”
  

If you need to sleep it off, always:

• Move to the back seat
  
• Keep keys in the trunk or outside the ignition
  
• Turn the vehicle completely off
  

Still not a guarantee – but much safer legally.

What Happens to My License After a DUI Arrest?

Your license can be suspended before you’re ever convicted.

Two types of suspensions exist:

1. Implied Consent Suspension → for refusing or blowing over .15
   
2. Criminal Conviction Suspension → if found guilty of DUI or DUAC
   

You may qualify for:

• Temporary Alcohol License (TAL)
  
• Route-restricted license
  
• Ignition Interlock Program
  

A lawyer can help restore driving privileges faster.

Do First-Time DUI Offenders Go to Jail?

Yes – jail time is possible for first-time offenders in SC.

1st Offense DUI Penalties:

• BAC .08–.09 → up to 30 days
  
• BAC .10–.15 → up to 30 days
  
• BAC .16+ → up to 90 days
  

Judges may allow:

• Community service
  
• Treatment programs
  
• ADSAP completion
  

But jail is not automatically waived for first offenders.

Can a DUI Be Expunged in South Carolina?

No – DUIs cannot be expunged under South Carolina law.

A DUI conviction remains on your criminal record for life.

Will My Insurance Go Up After a DUI?

Almost certainly.

After a DUI in South Carolina:

• Rates increase by 40% on average
  
• Drivers often pay $1,980/year instead of $1,414
  
• SR-22 filing may be required
  
• Some insurers cancel policies entirely
  

The financial impact often lasts 3–7 years.

Can I Refuse Field Sobriety Tests?

Yes – and you probably should.

Field Sobriety Tests (FSTs):

• Are voluntary
  
• Are not recorded in the law as mandatory
  
• Are subjective and often used to justify arrest
  

You won’t avoid arrest, but you avoid giving them flawed data.

What Is the Difference Between DUI and DUAC?

DUI = impaired driving
DUAC = Driving with Unlawful Alcohol Concentration (.08 or higher)

DUAC penalties are similar but:

• There is no requirement to prove impairment
  
• Only the test result matters
  
• DUAC is sometimes easier to negotiate
  

Do Officers Have to Read My Miranda Rights?

Not during the traffic stop.

Miranda rights are required only when:

• You are in custody
  
• You are being interrogated
  

Un-Mirandized roadside conversations are still admissible.

Should I Talk to the Officer?

Keep it simple:

• “I prefer not to answer questions.”
  
• “Am I free to leave?”
  
• Provide license/registration only.
  

Talking too much is one of the biggest reasons people get charged.

Do I Need a Lawyer for a First-Time DUI?

If you care about:

• Your license
  
• Your job
  
• Your insurance
  
• Your criminal record
  

Then yes.

DUI law in South Carolina is technical, fast-moving, and unforgiving. Defending yourself almost always results in harsher penalties.

Conclusion: Know Your Rights, Protect Your Future

A DUI charge in South Carolina can impact your freedom, your job, your license, and your reputation – even if it’s your first offense.

At Mastantuno Law Firm, we help clients:

• Challenge improper traffic stops
  
• Protect their license
  
• Fight breath and blood test results
  
• Avoid life-changing penalties
  
• Navigate ADSAP, IID, and reinstatement
  

If you’re facing a DUI charge, the worst thing you can do is wait.
Contact us today for a free consultation.