Maryland has banned food from its medical cannabis program but it still provides ways for patients to ingest the drug.

Dave hadn't slept for more than three hours straight after a series of botched surgeries 18 years ago left him with chronic pain so intense it kept him awake at night. Relief was hard to come by -- until he made a tray of marijuana-infused brownies. Half of a small fudgy square was enough to put him to sleep for 14 hours.

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