
A prescription does not protect you from a DUI charge in California. If you were arrested for driving under the influence of medication your doctor prescribed, the consequences are real, and so is the defense.
At William Kroger, Attorney at Law, our Los Angeles DUI prescription medication lawyer fights these charges across Los Angeles County courts. Call (323) 655-5700 for a free consultation.
Prosecutors treat a drug DUI as seriously as drunk driving. A conviction can cost you your license, record, and freedom. We challenge the stop, the testing, and the claim that your medication impaired your driving. You followed your doctor’s orders, and we make sure the court hears it.
Why Choose William Kroger for Your Prescription Drug DUI Case in Los Angeles?

A prescription drug DUI is harder to prove than an alcohol case, and we use that to your advantage. There is no breathalyzer number for medication. The prosecution has to convince a jury that you were actually impaired, and that opening is where we attack.
Our Los Angeles DUI attorneys handle DUI defense throughout Los Angeles County courts. We know how local prosecutors build drug DUI cases and where those cases fall apart. Every arrest report, blood result, and officer observation gets scrutinized.
We move fast on the evidence that disappears. Blood samples can be retested. Calibration and chain-of-custody records can be demanded, and officer training logs can expose a weak drug recognition evaluation.
You are not a case number to us. We explain your options in plain language, return your calls, and build a defense designed to protect your license and record. When the goal is a dismissal or a reduced charge, preparation wins.
Prescription Medication DUI Charges Under California Law
Under California Vehicle Code 23152(f), it is illegal to drive under the influence of any drug. The law does not care whether the drug is illegal, over-the-counter, or prescribed by your physician. What matters is whether the medication impaired your ability to drive safely.
Alcohol cases have a clear line at 0.08 percent blood alcohol concentration (BAC). Drug DUI cases do not. There is no legal limit for prescription medication in your system, so prosecutors cannot point to a number. Instead, they must prove that your driving was actually impaired by the drug.
That distinction matters. The mere presence of a medication in your blood is not a crime. The prosecution has to show that, at the time you were driving, the drug affected you to the point that you could not drive like a sober person.
A valid prescription is not a defense
This surprises many of our clients. Under Vehicle Code 23630, the fact that you were legally entitled to use the drug is not a defense to a DUI charge. Following your doctor’s instructions does not make the charge disappear on its own.
That does not mean the case is hopeless. A lawful prescription, taken at a therapeutic dose, can support a strong argument that you were not impaired. We use your medical history to challenge the prosecution’s impairment theory, not to concede it.
Prescription Drugs That Commonly Lead to DUI Charges
Almost any medication that affects your nervous system can trigger a drug DUI arrest in Los Angeles. Officers and drug recognition experts look for signs of impairment, then connect them to whatever is in your system. These are the categories we see most often:
- Opioid painkillers. Medications such as oxycodone, hydrocodone, and codeine slow reaction time and cause drowsiness. A routine prescription filled after surgery or an injury can put you on an officer’s radar during a traffic stop, even at a normal dose.
- Benzodiazepines. Anti-anxiety medications such as Xanax, Valium, and Ativan are common drug DUI triggers. Their sedative effects can mimic the signs officers associate with impaired driving, which makes an innocent driver look guilty.
- Sleep aids. Ambien and similar medications appear often in prescription drug DUI cases. Residual effects can linger into the morning commute, so a driver who feels fine can still be accused of impairment hours after taking the drug.
- Muscle relaxers. Drugs such as Soma and cyclobenzaprine can cause grogginess, slowed coordination, and delayed reactions. An officer may read those effects as impairment, then build a case around roadside observations rather than real proof.
- ADHD medications and more. Stimulants, strong antihistamines, and certain antidepressants can all lead to charges. Whenever an officer claims a prescription affected your driving, the medication in your system becomes the centerpiece of the case.
How Prosecutors Try to Prove a Prescription Drug DUI
Because there is no chemical threshold for drugs, these cases lean heavily on opinion and observation. That makes the evidence far more vulnerable than prosecutors admit, and we dismantle each piece.
Officers usually start with their own observations, such as weaving, slow responses, or red eyes. Many of these signs have innocent explanations, ranging from fatigue to medical conditions. We press the officer on every assumption.
A drug recognition expert (DRE) may then perform a 12-step evaluation meant to identify drug impairment. These evaluations sound scientific, but they rely on subjective judgment and can be flawed. Training gaps and shortcuts in the protocol give us room to challenge the conclusion.
Blood testing is the prosecution’s strongest tool, and even that is open to attack. A blood sample can be mishandled, contaminated, or stored improperly. We demand the calibration logs, chain-of-custody records, and lab procedures behind every result.
Field sobriety tests round out the case. These roadside exercises are difficult for sober people, and officers often administer them incorrectly. When the testing is flawed, the impairment theory built on it falls apart.
Penalties for a Prescription Drug DUI Conviction in Los Angeles
A prescription drug DUI carries the same penalties as an alcohol DUI in California. A first offense is usually a misdemeanor, but the consequences reach well beyond a fine.
Under Vehicle Code 23536, a first DUI conviction can bring:
- Between 96 hours and 6 months in county jail
- A fine of $390 to $1,000, before court assessments that often multiply the total to several thousand dollars
- 3 to 5 years of probation
- A 6-month driver’s license suspension
- A court-ordered drug and alcohol education program
Penalties climb sharply with prior convictions. A second or third offense within 10 years brings longer jail terms, extended license suspension, and added program requirements. A fourth DUI within a decade, or a DUI that injures someone, can be charged as a felony.
There is one important difference in a drug-only DUI. The DMV does not automatically suspend your license at the time of a drug DUI arrest the way it does in an alcohol case, because there is no chemical per se trigger for medication. A suspension still follows a conviction in criminal court.
That gap is an opportunity. It buys time and creates leverage, and it is one more reason to put an experienced defense team on your case immediately. The sooner we engage, the more options we can protect.
How We Defend Prescription Medication DUI Charges
Every prescription drug DUI has weak points, and our job is to find them. We build the defense around the prosecution’s burden to prove actual impairment.
The traffic stop is where we start. If the officer lacked a lawful reason to pull you over, the evidence that followed can be suppressed. A bad stop can end the case before it reaches a jury.
Next, we attack the impairment evidence. Therapeutic use at a prescribed dose can show your body was accustomed to the medication and not impaired. Tolerance, timing, and dosage all undercut the claim that the drug affected your driving.
Blood evidence gets the same scrutiny. We review how the sample was drawn, stored, and tested, and we challenge any break in the chain of custody. Flawed results lose their power in front of a judge.
Innocent explanations matter too. Fatigue, anxiety, allergies, and medical conditions can all produce the signs officers label as impairment. We give the jury the full picture, not the prosecution’s narrow version.
When the evidence supports it, we push for a dismissal or a reduction. When trial is the right move, we are ready to fight.
FAQ
Can I be charged with a DUI if I took my medication exactly as prescribed?
Yes. California law focuses on impairment, not on whether you followed your prescription. If an officer believes the medication affected your driving, you can be arrested even when you did everything your doctor told you to do. Taking the drug correctly is not an automatic defense, but it can support a strong impairment challenge.
Is there a legal limit for prescription drugs like there is for alcohol?
No. Alcohol cases use a 0.08 percent BAC limit, but there is no equivalent number for medication. Prosecutors must prove you were actually impaired, which makes these cases more subjective and more open to challenge than a standard alcohol DUI.
Will the DMV automatically suspend my license for a prescription drug DUI?
Not at the time of arrest. A drug-only DUI does not trigger the automatic administrative suspension that applies in alcohol cases, because there is no chemical per se limit. A license suspension can still follow a conviction in criminal court, so the criminal case is critical.
Is a prescription drug DUI a misdemeanor or a felony?
Most are misdemeanors. A drug DUI becomes a felony when someone is injured, when you have a fourth offense within 10 years, or when you have certain prior DUI convictions. The right defense can keep a charge from escalating.
Contact a Los Angeles DUI Prescription Medication Lawyer
A prescription drug DUI charge in Los Angeles is serious, but it is not the end of the road. The prosecution has to prove impairment, and that is a fight we know how to win. The sooner you act, the more we can do to protect your license and your future.
At William Kroger, Attorney at Law, our Los Angeles DUI prescription medication lawyer challenges the stop, the testing, and the impairment claim from day one. We treat your case with urgency and your goals as our own.
Do not face these charges alone. Call (323) 655-5700 today for a free case evaluation and let our team start building your defense.

