. >> meet 19-year-old chaz moore. he uses many different strains of marijuana.hem high in cbd to treat his rare disorder of the diaphragm. >> my abs lock up. >> that's why he is talking this way, almost speaking in hiccups, like he can't catch his breath. it's called myoclonus diaphragmatic flutter. >> it becomes painful. pretty quickly i imagine. >> yeah. >> after, like, 15, 20 minutes this is where i can start to really feel. >> he is about to show me how the marijuana works. he has been convulsing now for seven minutes. >> how quickly do you expect this to work? >> within like the first five minutes. >> and i'm done. like -- >> that's it? >> that's it. >> it was actually less than a minute. >> depending on the attack and the day, like, it will work within the first couple of hits. >> hear how his voice is completely different. that attack lasted eight minutes, but some have last much longer and happen as often as 40 times a day. and like charlotte, he had tried so many things before. by 16 chaz was taking these powerful, addictive, potentially deadly narcotic