CNN Weed Dr. Sanjay Gupta Reports February 2, 2014 09:16:00
>> it becomes painful. >> quickly, i imagine. >> after 15, 20 minutes, i start to really feel it. >> he is about to show me how the marijuana works. he's been convulsing now for seven minutes. >> how quickly do you expect this to work? >> within the first five minutes. >> and i'm done. >> that's it? >> was actually less than a minute. >> depending on the attack and the day, sometimes within the first couple hit -- >> that alack lasted eight minutes but some have lasted much longer. and happen as often as 40 times a day. and like charlotte, he tried so many things before. by 16, chaz was taking...