Frequently asked questions How much cannabis can I possess in Pennsylvania with an MMJ Card? In Pennsylvania, you can possess the following amounts with a valid MMJ Card: – 30 day supply, to be determined upon consultation As initially enacted, only cannabis-infused pills, oils, topical ointments, tinctures or liquids were allowed. On April 16, 2018, the state Health Secretary approved an advisory board recommendation to permit dispensaries to also begin providing herbal cannabis. Under the rule change, patients are permitted to vaporize herbal cannabis, but are still prohibited under the law from smoking. N/A recreational. Dispensaries are allowed to sell up to a 30-day supply to a patient, with records kept for each amount obtained. Patients may re-up on their 30-day supplies during the last 7 days of their previous 30-day allotment.