charlotte figi had an extreme form of epilepsy.y was so frail that any seizure could kill her. with no traditional treatment left to try and the clock ticking away, her parents decided to try marijuana. charlotte was just 5 years old. >> i need a card to be able to get the cannabis from a pharmacy. doctors have to prescribe it. >> you need two doctors in colorado to get the card for a juvenile or a child. it was hard. we were the first young child, and they said, no. everyone said, no, no, no, no. >> certainly her age played a role in my hesitance. >> dr. alan shackelford is a harvard-trained physician. he is also among a handful of doctors in colorado who give prescriptions for medical marijuana. from the moment charlotte entered his office, he knew she was in trouble. while he was just examining her, she had two seizures. >> she had failed everything. there were no more options for her. everything had been tried, except cannabis. >> here's how scientists think it might work. marijuana is made up of two main ingredients, thc, that