A federal lawsuit claims the ban on bringing medical marijuana across state lines violates an epileptic girl's constitutional rights.

Twelve-year-old Alexis Bortell uses a cannabis oil called Haleigh's Hope to prevent life-threatening epileptic seizures.

She takes the oil orally by syringe twice a day, and always keeps a THC spray on hand in case she experiences an aura, or pre-seizure event.

The auras happen maybe once every three to four weeks – far less often now that she moved to Colorado than when she lived in Texas. 

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Madison Margolin ~ RollingStone.com