Medical marijuana for epilepsy in Arizona (2026).

Cannabis and epilepsy have a longer, deeper research history than almost any other medical use. The story of Charlotte Figi — a young girl with Dravet syndrome whose seizures dropped from 300 per week to a handful with CBD-rich cannabis oil — transformed both medical practice and public perception. Arizona has recognized seizure disorders as a qualifying condition since the original 2010 statute, and CBD is now FDA-approved as Epidiolex for several severe childhood epilepsies.

How cannabis works for epilepsy

Cannabidiol (CBD) has well-established anticonvulsant properties, working through multiple mechanisms:

• CB1 and CB2 receptor modulation — affects neuronal excitability
• Serotonin receptor activity (5-HT1A) — modulates seizure threshold
• GABA enhancement — increases inhibitory neurotransmission
• Glutamate modulation — reduces excitatory neurotransmission
• Anti-inflammatory effects — reduces neuroinflammation implicated in some epilepsies

THC has anticonvulsant effects at very low doses but can be proconvulsant at high doses in some patients — this is why CBD-dominant products are typically preferred for seizure control.

What the research says

• 2017 randomized trial in Lancet Neurology found CBD reduced seizure frequency by 43% in Dravet syndrome patients vs. 27% placebo.
• 2018 trial in NEJM found CBD reduced drop seizures in Lennox-Gastaut syndrome by 44% vs. 20% placebo.
• 2018 FDA approval of Epidiolex (CBD) for Dravet, Lennox-Gastaut, and tuberous sclerosis complex — first FDA-approved cannabis-derived drug.
• 2020 meta-analysis in BMJ Open confirmed CBD efficacy across multiple pediatric epilepsy syndromes.
• 2022 study in Lancet Neurology found sustained CBD benefit in refractory focal epilepsy.

Which seizure types respond best?

• Dravet syndrome — strong evidence; Epidiolex approved
• Lennox-Gastaut syndrome — strong evidence; Epidiolex approved
• Tuberous sclerosis complex — strong evidence; Epidiolex approved
• Refractory focal epilepsy — moderate evidence
• Generalized tonic-clonic seizures — moderate evidence
• Absence seizures — mixed evidence
• Post-traumatic epilepsy — limited evidence

How to qualify in Arizona

Seizures are on the explicit list of qualifying conditions. The application is standard:

• $79 physician evaluation (mmj card az)
• $150 AZDHS state fee
• Most patients are approved on the first visit

For minors with severe epilepsy, a designated caregiver (typically a parent) completes the application. See our under-21 guide for details.

Best product types for epilepsy

For pediatric epilepsy (under 18)

• High-CBD tincture (10:1 or 20:1 CBD:THC) — easiest to dose accurately for children
• High-CBD capsules — for older kids who can swallow pills
• Dosing: 5–10mg CBD per kg of body weight per day, divided into 2–3 doses, titrated up over 4 weeks

For adult epilepsy

• CBD tinctures or capsules — 25–100mg CBD twice daily is a common range
• High-CBD flower for breakthrough seizures
• Avoid high-THC products as primary treatment (paradoxical proconvulsant effect at high doses)

Drug interactions with anti-seizure medications

This is critical to discuss with your neurologist. Important interactions:

Clobazam (Onfi, Frisium)

CBD inhibits CYP2C19, which metabolizes clobazam's active metabolite. Adding CBD can double clobazam levels, causing excessive sedation. Most patients need a clobazam dose reduction when starting CBD.

Valproate (Depakote, valproic acid)

Generally safe with CBD. Both can affect liver enzymes, so monitor LFTs at baseline and periodically. Some patients report added benefit when combined.

Levetiracetam (Keppra)

Few known interactions with cannabis. Levetiracetam itself has minimal drug interactions, making it a relatively safe combination.

Other anti-seizure meds

Most AEDs are reasonably safe with CBD, but always coordinate with your neurologist. Baseline AED levels + liver enzymes before starting cannabis; recheck at 4 weeks and 3 months.

When CBD isn't enough

For some patients with refractory epilepsy, CBD alone doesn't fully control seizures. Options include:

• Adding low-dose THC (often a 20:1 or 10:1 CBD:THC ratio)
• Higher CBD doses (up to 50mg/kg/day in severe cases under specialist care)
• Adding THCV (a minor cannabinoid with emerging anticonvulsant evidence)
• Combining with ketogenic diet — established for drug-resistant epilepsy, may synergize with cannabis
• Vagus nerve stimulation (VNS) — non-cannabis intervention often combined with cannabis

All of these should be managed by a neurologist experienced in cannabis medicine.

Pediatric considerations

For children with severe epilepsy, medical cannabis is one of the most established uses. Important considerations:

• Dose by weight: pediatric dosing is calculated per kg of body weight
• Titrate slowly: increase dose over 4 weeks to minimize side effects and find minimum effective dose
• Caregiver administration: parent or guardian administers and tracks doses
• School accommodations: some AZ schools will administer CBD under a 504 plan; this requires physician documentation
• Drug interactions: especially relevant if the child is on multiple AEDs

CBD vs. Epidiolex

Many patients and families ask: should I use state dispensary CBD products or prescription Epidiolex?

Epidiolex advantages

• FDA-approved — standardized dose and purity
• Insurance coverage (sometimes, with prior authorization)
• Proven for the specific syndromes it's approved for (Dravet, Lennox-Gastaut, TSC)

Dispensary CBD advantages

• Much cheaper out of pocket ($50–100/month vs. $1,000–3,000/month for Epidiolex without insurance)
• Wider variety of products (different ratios, terpenes, minor cannabinoids)
• Available for conditions Epidiolex isn't approved for (focal epilepsy, generalized epilepsy)
• No prior authorization or insurance paperwork

For most patients, dispensary CBD is the practical choice. For severe Dravet or Lennox-Gastaut cases, Epidiolex + insurance may be cost-effective.

Cost and how to get started

Application is standard:

• $79 physician evaluation (mmj card az)
• $150 AZDHS state fee
• Total: $229 first year (or $49 + $0 = $49 for veterans)

Most epilepsy patients are approved. For minors, an additional $200 caregiver fee applies.