Later, he shows a small girl whose epilepsy is brought under control when no other medication worked, and she starts eating normally (she had been tubefed) and goes back to school.
The documentary actually starts with presenting the little girl, Charlotte. It then traces the history of marijuana, which was prescribed legally until 1930.Harry Anslinger found that he could exploit the public fear of drugs for political purposes (explained here). The substance in the cannibas plant that controls seizures, Cannabidiol, is not mind altering and probably could be manufactured if legal and sold; it would seem then that pharmaceutical companies would have a new motivation to keep the plant illegal bu substances extracted from it, at cost to consumer and for corporate profits, legal. Charlotte needed only the Cannabidiol, and without specific medication available, needed a variety of plant high in Cannabidiol and as low in THC as possible, so it had to be especially grown. The family in Colorado was the only source of this possible plant. The family at first did not want to give the plant to a young child.
The show mentions that NIH and some other authorities don't recognize the medicinal value even of cannabidiol. That doesn't make much sense now.
Marijuana is often more concentrated today. Although science shows it less "addictive" than many other substances, the body develops tolerance and cannot easily console itself with naturally occurring brain chemistry if using the drug. Users tell me that it intensifies senses, especially visual details. I've tried it only maybe twice in NYC, once in New Mexico on a camping trip in 1980, with no effect at all.
Update: July 13, 2014
Giupta aired "Weed 2", a second hour of documentary, following up on some patients. More states have expanded medical marijuana but patients cannot cross state lines. In New Jersey, Gov. Chris Christie shut down the expansion. One family had to move to Colorado.