Last verified: March 2026

The 4,341-Vote Victory

Proposition 203 established Arizona's medical marijuana program by the thinnest margin imaginable — 50.13% to 49.87%, a gap of just 4,341 votes out of more than 1.67 million cast. Results were not called until twelve days after Election Day as provisional and early ballots slowly pushed the measure ahead. It passed despite opposition from Governor Jan Brewer, Attorney General Terry Goddard, and every sheriff and county prosecutor in the state.

Why Keep a Medical Card?

Patient enrollment peaked at 299,054 in January 2021 but has fallen to fewer than 100,000 as most patients found it simpler to buy recreational. However, keeping a card still offers meaningful advantages:

• Higher possession limit: 2.5 ounces per 14 days vs. 1 ounce recreational
• Lower taxes: ~8% sales tax only vs. ~23–24% for recreational (no 16% excise)
• Employment protections: Limited protections under AMMA that recreational users do not receive
• Home cultivation: Patients living more than 25 miles from a dispensary can grow up to 12 plants

Qualifying Conditions

Over 90% of medical patients cite chronic pain. Qualifying conditions include:

• Cancer, glaucoma, HIV/AIDS, hepatitis C
• Amyotrophic lateral sclerosis (ALS)
• Crohn's disease
• Agitation of Alzheimer's disease
• A chronic or debilitating disease or medical condition causing severe and chronic pain, severe nausea, seizures, or severe and persistent muscle spasms
• PTSD (added in 2014)

The Patient Enrollment Decline

Medical sales fell from $758 million in 2021 to roughly $180 million in 2025, making the segment less than 15% of the total market. The decline is straightforward — most patients found it simpler to buy recreational without the hassle and cost of maintaining a card, even with the 16% tax differential.

Official Sources

• ADHS Medical Marijuana Program