WV 30-Day Supply Limit — ~30 g THC Equivalency

Last verified: May 2026

The Statute

The West Virginia Medical Cannabis Act limits patient possession to a "30-day supply" without specifying a precise quantity in statute. The Office of Medical Cannabis (OMC) has implemented this through rules and the METRC track-and-trace system, interpreting the cap as approximately 30 grams of THC equivalency per 30-day rolling window for the typical patient. The actual quantity depends on three factors:

• The certifying physician’s recommendation — physicians can specify a lower or higher monthly cap based on the patient’s condition and tolerance, within OMC-defined ceilings
• The product form — dry leaf, concentrates, vape cartridges, tinctures, and pills each have separate effective caps based on THC content
• METRC enforcement — every transaction at every WV dispensary updates the patient’s 30-day usage in real time

Practical Quantity Examples

The 30-gram THC equivalency translates roughly as follows for common product categories. (Exact quantities vary based on potency; dispensary point-of-sale will calculate the effective limit at purchase.)

• Dry leaf (vape flower) at ~20% THC: ~150 g per 30 days (5 oz)
• Vape cartridges at ~80% THC: ~37.5 g per 30 days (~37 0.5g cartridges or ~18 1g cartridges)
• Concentrates (live resin, distillate) at ~80% THC: ~37.5 g per 30 days
• Tinctures: based on mg THC content per bottle
• Pills/capsules: based on mg THC per pill (typical 5-20mg per dose)
• Topicals: typically a separate cap or no cap (lower psychoactive effect)

These translations are approximate. The OMC publishes specific equivalency tables that dispensary point-of-sale systems apply. A patient buying a mix of products has the limit consumed pro-rata across categories.

METRC — The Track-and-Trace Enforcement Layer

West Virginia uses the METRC seed-to-sale track-and-trace system, the same platform used by Colorado, Oregon, Michigan, and most U.S. medical and adult-use programs. Every plant, every harvest, every package, every wholesale shipment, and every retail sale is logged in METRC with a unique ID. Patient transactions are matched to the patient’s OMC card number; the system tracks cumulative purchases over a rolling 30-day window.

When a patient attempts to purchase product that would exceed the 30-day cap, the dispensary’s point-of-sale system blocks the sale. The block is automatic and not at the dispensary’s discretion. A patient with 5g remaining in their window cannot purchase a 7g product; the budtender will inform them and offer a smaller package or ask them to return after their window resets.

The 30-day window is a rolling window, not a calendar reset. A patient who purchased 30g of THC equivalency on April 1 can purchase again starting May 1, but only as the day-by-day window opens.

Why Both Patient and Caregiver Are Capped

A patient may designate up to two caregivers, and a caregiver may serve up to five patients (W. Va. Code § 16A-3-1). Each caregiver-patient pair has a separate 30-day limit in METRC. If a caregiver purchases on behalf of patient A, that purchase counts against patient A’s window, not the caregiver’s. METRC tracks the patient end-state, not the caregiver. See get-card page for caregiver registration.

Consequences of Exceeding the Limit

If discovered at point of sale

The transaction is blocked. The patient is informed. No further consequence except deferred purchase.

If discovered through METRC audit, patient registry review, or law-enforcement contact

• Program suspension — the OMC may suspend the patient’s card pending review; renewal at the next anniversary may be denied
• Caregiver scrutiny — if a caregiver is implicated, the OMC may suspend the caregiver’s registration and refer for state and federal investigation
• Possible misdemeanor exposure — possession of cannabis beyond the certified 30-day supply by a registered patient is technically out-of-card and exposes the holder to W. Va. Code § 60A-4-401(c) misdemeanor possession (90 days–6 months jail, up to $1,000); see possession-penalties page
• Diversion concerns — if quantity, packaging, or distribution circumstances suggest sale or transfer to a non-cardholder, the patient or caregiver may face W. Va. Code § 60A-4-401(a) felony charges (1–5 years prison, up to $15,000 fine)

Cross-Border Cannabis & the 30-Day Limit

The 30-day supply limit applies only to West Virginia–purchased product. Cannabis brought into West Virginia from Maryland, Ohio, Pennsylvania, Kentucky, or Virginia is illegal regardless of WV card status. A patient who purchases adult-use cannabis legally in Hagerstown, MD and crosses I-81 back to Martinsburg, WV is in possession of state-illegal cannabis the moment they cross the West Virginia line, and the WV card is not a defense because the product was not purchased through a WV-licensed dispensary and is not registered in METRC. Both misdemeanor possession and (for larger quantities) trafficking under § 60A-4-409 are possible. See Maryland cross-border page.

Practical Patient Strategy

• Plan dispensary visits around the rolling window — budget purchases across the 30-day cycle rather than buying everything early-month
• Track your usage — some patients keep a journal; the OMC patient portal and many dispensary loyalty programs also show recent purchase history
• Ask your physician about the certified amount — the cap is partly physician-determined; if your tolerance is high, your physician may certify above the standard ~30g THC equivalency within OMC-defined ceilings
• Use lower-potency / topical / tincture combinations — pulls less from your 30-day cap than concentrate-heavy purchases
• Avoid cross-border purchases — the legal exposure exceeds the access convenience

Oversight & Audit

The OMC reviews METRC data regularly and audits dispensaries for compliance. Patients with unusual purchase patterns (e.g., maxed-out windows month after month, simultaneous purchases at multiple dispensaries on the same day, large concentrate volumes) may be flagged for review. The OMC has the statutory authority to suspend cards and revoke caregiver registrations, and it does so when warranted. METRC data is also discoverable in criminal proceedings if the OMC or a court orders production.