 Written by Ben Breiner | Reviewed by Pamela Goforth, Licensed Insurance Agent | Updated Sept 3, 2026 Content reviewed for accuracy by a Texas-licensed insurance professional. |
Yes — in Texas, you can get a DWI for substances other than alcohol. Impairing drugs like marijuana, cocaine, and prescription opioids can affect your judgment and coordination just as alcohol does, and Texas Penal Code § 49.01 explicitly covers intoxication from alcohol, controlled substances, drugs, or any combination of these. Detection methods include officer observations, field sobriety tests, and chemical analyses, each with varying reliability. Penalties mirror those for an alcohol-related DWI — the substance involved doesn’t create a separate, lesser charge in Texas.
Types of Substances Involved
When it comes to driving under the influence in Texas, a variety of substances can impair your ability to operate a vehicle safely — the law doesn’t limit “intoxicated” to alcohol alone.
Marijuana is the most frequently detected illegal drug in drivers involved in crashes, often leading to impaired judgment and slowed reaction time. Cocaine can cause confusion and aggression, while opioids and heroin significantly reduce cognitive function and alertness. Hallucinogens distort perception, leading to poor decision-making behind the wheel. Studies indicate that combining substances, particularly alcohol and THC together, significantly increases crash risk beyond either substance alone.
Prescription medications, including opioids and certain anti-anxiety drugs, pose real risks by affecting coordination and reaction times — even when legally prescribed and taken as directed. Over-the-counter medications, particularly some antihistamines, can cause drowsiness comparable to illegal drugs. With a significant share of drivers in fatal crashes testing positive for drugs nationally, awareness of these substances matters for safe driving regardless of whether alcohol is involved. A conviction involving any of these substances may still require non-owner SR-22 insurance if your license is suspended as a result.
Impairment Detection Methods
Impairment detection methods help identify drivers who pose a danger due to substance use, whether alcohol or drugs are involved. Officers observe driving patterns, noting behaviors like swerving or erratic speed, and assess demeanor during traffic stops — signs like slurred speech and unusual eye movement can indicate impairment from multiple substance types, not just alcohol.
Field sobriety tests, such as the Horizontal Gaze Nystagmus and Walk-and-Turn tests, evaluate balance and coordination, though results can be affected by factors unrelated to intoxication. Chemical tests like blood and urine analysis provide measurable data on substance presence, though timing and specific substance detected can complicate interpretation. Officers may also involve a Drug Recognition Expert for cases where standard field sobriety and BAC assessments don’t clearly explain observed impairment, since a driver can be well below the 0.08% alcohol threshold and still be intoxicated under Texas law due to drugs.
Legal Consequences in Texas
A DWI involving drugs rather than alcohol carries the same legal consequences in Texas as a standard alcohol-related DWI — the substance itself doesn’t create a separate, lesser charge:
- Fines: Up to $2,000 for a first offense, up to $4,000 for a second, and up to $10,000 for a third or subsequent felony offense.
- Jail Time: A mandatory 72-hour minimum for a first offense (up to 180 days), a 30-day minimum for a second (up to one year), and 2 to 10 years for a third or subsequent felony offense.
- License Suspension: 90 days to one year for a first offense, 180 days to two years for a second or subsequent.
- Additional Requirements: Community service, DWI education programs, and possibly an ignition interlock device before regaining full driving privileges.
A conviction also requires filing an SR-22 Financial Responsibility Insurance Certificate for two years, identical to the requirement following an alcohol-related DWI.
Special Circumstances and Considerations
While many people associate DWI charges solely with alcohol, a wide range of impairing substances — illegal drugs, and certain prescription or over-the-counter medications — can lead to the same serious legal consequences in Texas.
Special circumstances may arise, such as driving during a medical emergency, which is occasionally raised as a necessity defense — though this defense is rarely successful and hinges on demonstrating the emergency genuinely justified the impaired driving. Aggravating factors, like having a minor in the vehicle or causing an accident, can escalate charges considerably regardless of which substance was involved. The accuracy of drug testing methods and the specifics of the traffic stop remain critical elements influencing the outcome of a defense.
DUI vs. DWI Terminology in Texas
Unlike some states that use “DUI” broadly for both alcohol and drug impairment, Texas draws a specific distinction: “DWI” applies to adults 21 and older impaired by alcohol, drugs, or a combination, while “DUI” is reserved specifically for minors under 21 under Texas’s zero-tolerance policy for any detectable alcohol. Regardless of which term applies to your situation, drug impairment is treated with the same seriousness as alcohol impairment under Texas law — there’s no separate, lesser “drugged driving” charge.
Conclusion
Driving impaired by drugs in Texas carries the same real legal consequences as driving impaired by alcohol — the same fines, the same jail time ranges, and the same SR-22 filing requirement afterward. Understanding that Texas law treats intoxication broadly, not just as a matter of alcohol and BAC, matters for anyone taking prescription medication or considering driving after using any impairing substance.
| Written by Ben Breiner | Reviewed by Pamela Goforth, Licensed Insurance Agent | Updated Sept 3, 2026 Content reviewed for accuracy by a Texas-licensed insurance professional. |