Cannabis DUI Laws in Arizona

Arizona (AZ)Zero Tolerance

Any detectable amount of THC in a driver's system can result in a DUI charge, regardless of actual impairment.

View full Arizona cannabis market profile →

DUI Law Details

THC Limit

Zero tolerance (any detectable amount)

legal threshold

Testing Method

Blood, urine, field sobriety

authorized methods

Implied Consent

Yes

required for licensed drivers

First Offense Penalty

Minimum 10 days in jail (9 suspended), fines up to $2,500, 90-day license suspension

Test Refusal Penalty

12-month license suspension

Overview

Arizona enforces a zero-tolerance policy for cannabis and driving. Under Arizona's DUI statute, it is illegal to drive with any detectable amount of THC or its metabolites in your body. This means even trace amounts from days-old consumption can lead to a DUI charge.

However, a 2014 Arizona Supreme Court ruling (Dobson v. McClennen) clarified that the inactive metabolite carboxy-THC alone is not sufficient for a DUI conviction — only the active compound (hydroxy-THC) or parent THC qualifies. This provides some protection for medical cannabis patients, but Arizona remains one of the strictest states for cannabis DUI enforcement.

Key Facts

•Zero tolerance — any detectable active THC can result in a DUI
•Inactive metabolite (carboxy-THC) alone is not sufficient per Dobson ruling
•12-month license suspension for refusing chemical tests
•First offense carries minimum 10 days jail (9 may be suspended)
•Medical cannabis patients are not exempt from DUI laws
•Arizona legalized recreational cannabis in 2020 but DUI laws remain strict

Frequently Asked Questions

Can I get a DUI for THC metabolites in Arizona?+

Only active THC (delta-9 or hydroxy-THC) can support a DUI charge, not the inactive metabolite carboxy-THC. This was established by the Arizona Supreme Court in the 2014 Dobson ruling.

Does having a medical marijuana card protect me from DUI in Arizona?+

No. Medical cannabis patients are not exempt from Arizona's DUI laws. If active THC is detected in your system while driving, you can be charged regardless of your patient status.

What are the penalties for a first cannabis DUI in Arizona?+

A first-offense DUI carries a minimum of 10 days in jail (9 may be suspended), fines up to $2,500, a 90-day license suspension, and mandatory drug screening.

What if I refuse a blood test in Arizona?+

Under implied consent, refusing a chemical test results in a 12-month license suspension, regardless of whether you are ultimately convicted of DUI.

Related State DUI Laws

Explore cannabis DUI laws in other states with similar regulations or neighboring jurisdictions.

Effect-Based Standard

Continue Exploring

Arizona Cannabis Market

Disclaimer: The information on this page is provided for educational and informational purposes only and does not constitute legal advice. Cannabis remains illegal under US federal law. Arizona DUI laws and regulations are subject to change and may vary by local jurisdiction. THC limits, penalties, and testing methods described here are based on publicly available information and may not reflect the most current regulations. Always verify current laws with official Arizona state resources and consult with a qualified attorney for legal guidance. Cannabismarketcap does not guarantee the accuracy or completeness of any information presented.