Drug-Related DUI — Even Legal Prescriptions Can Suspend Your License
California VC §23152(f) makes it illegal to drive under the influence of any drug — including legally prescribed medications. If your blood test came back positive for drugs, the DMV will move to suspend your license through an APS hearing. There is no "legal limit" for drugs like there is for alcohol.
Drug DUI cases are defensible. The science is complicated — and that works in your favor.
Defending drug-related DUI cases across California
Drug DUI DefensePrescription CasesMarijuana DUIBilingual 🇺🇸🇲🇽Substances That Trigger Drug DUI in California
Marijuana / THC
Legal to possess, but no legal limit for driving. Presence of THC in blood can trigger DUI charges.
Prescription Meds
Ambien, Vicodin, Xanax, Adderall — any medication that impairs driving ability counts.
Illegal Substances
Cocaine, methamphetamine, heroin, ecstasy, and other controlled substances.
Over-the-Counter
Antihistamines, sleep aids, and cough medicine containing codeine can cause impairment.
Combined Use
Drugs combined with any amount of alcohol (VC §23152(g)) carry the same penalties.
Metabolites
Some drug tests detect inactive metabolites — meaning the drug was used days or weeks ago, not at the time of driving.
How We Defend Drug DUI Cases
Drug DUI cases are scientifically complex — which means more opportunities to challenge the evidence.
Challenge the Blood Test Results
Unlike alcohol, there's no universally accepted "impairment level" for drugs. We challenge the lab's testing methodology, chain of custody, contamination risks, and whether the results actually prove impairment at the time of driving.
Question the Drug Recognition Expert (DRE)
Many drug DUI arrests rely on a DRE officer's evaluation — a 12-step process that's subjective and frequently challenged. We scrutinize every step of the DRE protocol for errors and inconsistencies.
Active Drug vs. Inactive Metabolites
THC metabolites can remain in blood for days or weeks after use. A positive test doesn't mean you were impaired while driving. We argue the critical distinction between active impairment and residual presence.
Prescription Defense
If you were taking legally prescribed medication as directed by your doctor, we argue that you had no reason to believe it would impair your driving — and that the medication's effect doesn't meet the legal standard of "under the influence."
Hearing Representation
We present your defense at the APS hearing, cross-examine the officer and any toxicology experts, and challenge whether the DMV has met its burden of proof.
Affordable Representation for Complex Cases
Drug DUI cases often require more analysis than standard alcohol DUI — but that doesn't mean more expensive. We offer flat-fee pricing that covers the full hearing process, including evidence review and expert challenge preparation.
Free consultation • Flat-fee pricing • No hidden costs
Important: DMV Hearing Advocate provides administrative hearing representation services. We are not a law firm and do not provide legal advice or criminal defense representation. Drug-related DUI carries serious criminal penalties — please consult a licensed attorney for your criminal case. Our services are limited to DMV administrative hearings.
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